ris3n's Apologetics Codex

Concept

Christianity

Intro

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What is Christianity? At its core, Christianity is the claim that the God who made the world stepped into history as a real human being named Jesus of Nazareth, died on a cross to deal with human wrongdoing, and rose from the dead three days later. Anyone who trusts him is reconciled to God and joined to a new family that lives differently as a result.

Christians believe in one God who has always existed as three persons: the Father, the Son, and the Holy Spirit. This is the Trinity. The Son is the one who became human as Jesus while never stopping being God. That single idea, called the Incarnation, is what makes Christianity different from every other belief about God.

The story has a shape. God created the world good. Humans rebelled and broke their relationship with him. God promised through Israel that he would put things right. Jesus is the fulfillment of that promise. He lived the life humans were meant to live, took the consequences of their rebellion on himself, and rose to start a new creation that will be completed when he returns.

Christianity is a package. The big claims hold each other up. Take away the Trinity and the Incarnation stops making sense. Take away the Incarnation and the Cross has no power. Take away the Resurrection and the whole faith collapses (the New Testament itself says this, see 1 Cor 15:17). Christians have been working out the connections for two thousand years.

It also shapes how you live. A Christian is not just someone who believes certain things about Jesus; a Christian is someone whose loves, habits, and direction in life are being remade by him. Love of God and love of neighbor are the two commands Jesus said summed up everything else.

The hub below maps out the doctrinal core, the person of Christ, the lived practice, and how the package compares to other worldviews. It is the entry door to the whole Christianity layer of the codex.

In full

The codex's master hub for the whole Christian package, the doctrinal core (Christian Theism), the doctrine of Christ (Christology), and the practical-doctrinal shape of the Christian life (Christian Living) consolidated into a single integrated reference. Christianity, in this codex, is the affirmation that the Christian Scriptures' account of God, world, humanity, sin, and redemption is true, the God of Israel revealed in the Old Testament is the same God who became incarnate in Jesus of Nazareth, died and rose bodily, and through that work reconciles humanity to himself, and that this affirmation reshapes the whole of a believer's life under the lordship of Christ.

Christianity is not identical to theism-in-general (the bare claim that some god exists), nor to classical theism alone (the metaphysical-conception of God shared with Jewish-Maimonidean and Islamic-Avicennan-Ghazalian theistic traditions), nor to Christian doctrine-in-isolation (the dogmatic theology distinct from its philosophical defense), nor to Christian ethics-in-isolation (virtues without their grounding in regenerate union with Christ). It is the integrated package that holds together doctrine, person of Christ, and lived discipleship as one mutually-reinforcing whole. The canonical doctrinal articulation is the Nicene Creed (381 AD) read with the Chalcedonian Definition (451) and the Reformation-confessional clarifications. The biblical anchor is 1 Corinthians 15:3-8, the pre-Pauline creed dated AD 35-38: "Christ died for our sins according to the Scriptures, and that He was buried, and that He was raised on the third day according to the Scriptures, and that He appeared...", historically among the earliest summaries of the Christian package.

Part I, The doctrinal core (Christian Theism)

Six structural commitments organize Christianity's doctrinal core. Each is biblically grounded, historically articulated, and apologetically defended. Each is load-bearing.

  1. Classical-theistic metaphysics. There is one God (Deut 6:4; James 2:19; 1 Cor 8:6), simple (not composed of parts), a se (self-existent, depending on nothing outside himself), eternal, omniscient, omnipotent, omnipresent, perfectly good, the creator of all that is not God. The articulation runs from Augustine and Anselm through Aquinas's Summa Theologiae I qq. 2-13 to the Reformed-scholastic and Roman-Catholic-magisterial traditions. See Doctrine for the full attribute-taxonomy.

  2. Trinitarian elaboration. The one God exists eternally as three distinct hypostases (persons): Father, Son, and Holy Spirit, each fully God, each numerically identical with the divine essence, distinguished only by relations of origin. The Father is unbegotten; the Son is eternally begotten; the Spirit eternally proceeds (the Filioque dispute distinguishes West and East). The Trinity is not optional decoration on classical theism, it is the form Christian-theistic monotheism takes. See Trinity + Trinity vs Oneness vs Modalism vs Arianism + the Cappadocian articulation at Constantinople I (381).

  3. Christological-incarnational claim. The eternal Son took on full human nature in Jesus of Nazareth (c. 6 BC, AD 30/33), born of the Virgin Mary, conceived by the Holy Spirit. Jesus is fully God and fully human, the classical Chalcedonian two-natures formula (Chalcedon 451): one person in two natures, fully God and fully man, the natures united without confusion, change, division, or separation. The Incarnation is the defining Christian-distinctive against Jewish, Islamic, and Unitarian theism. (Detailed treatment in Part II below.)

  4. Atonement. Christ's death on the cross objectively reconciles humanity to God, by substitution (penal-substitutionary, Christus-Victor, recapitulation, moral-influence are the four classical theories; Christianity holds all-or-most simultaneously in different theological strands). The atonement is the answer to the original-sin and inherited-guilt problem (see Inherited Guilt and Visiting Iniquity Objection Defeater for the Adam-Christ federal-headship parallel). See Atonement Theory Spread + Penal Substitutionary Atonement + Christus Victor.

  5. Bodily resurrection. Christ rose bodily from the dead on the third day after his crucifixion (1 Cor 15:3-8 creed; Gospels' resurrection narratives). The resurrection is not a metaphor, not a spiritual-only awakening, not a hallucination-of-the-disciples, it is a historical-event-claim defended by historical-evidential apologetic (Habermas + Licona minimal-facts method; N.T. Wright The Resurrection of the Son of God 2003). The resurrection vindicates Christ's claims and inaugurates new creation; without it, "your faith is worthless; you are still in your sins" (1 Cor 15:17). See 1 Corinthians 15.3-8 (rich-hub) + the broader Resurrection-of-Christ apologetic.

  6. Eschatological consummation. The Kingdom of God is inaugurated at Christ's first coming (Mt 4:17; Mk 1:15; Lk 17:21) and will be consummated at Christ's bodily return, the already-and-not-yet framework. The consummation includes the bodily resurrection of all the dead (Dan 12:2; John 5:28-29; 1 Cor 15:42-44), final judgment (Mt 25:31-46; Rev 20:11-15), and the new creation (Isa 65-66; Rev 21-22). See Resurrection of the Body + Hell and Eternal Punishment for the multi-position synthesis on the consummation's details.

The compact formula: Unus Deus Trinitas, in Christo incarnatus, per crucem et resurrectionem reconciliatus, in regno consummandus, "One God in Trinity, incarnate in Christ, reconciling through cross and resurrection, consummating in the Kingdom."

Part II, Christology (the doctrine of Christ in detail)

The doctrine of Christ is the densest single thematic thread in ris3n's corpus and the structural pivot of the Christianity package: without it, classical theism remains generic, the Trinity has no economic visibility, the atonement has no agent, the resurrection has no subject, and the Kingdom has no king.

The Chalcedonian two-natures formula (AD 451)

Christ is one person in two natures, fully God and fully man, the natures united without confusion, change, division, or separation.

"We confess one and the same our Lord Jesus Christ, the same perfect in Godhead, the same perfect in manhood, truly God and truly man… acknowledged in two natures, without confusion, without change, without division, without separation; the distinction of natures being in no way destroyed by the union, but rather the property of each nature being preserved, and concurring in one person and one hypostasis."

The four negations (asynchutōs, atreptōs, adiairetōs, achōristōs) define the orthodox boundary against the major Christological heresies:

Heresy What it denied Claimed Christ was… Council that condemned
Docetism Real humanity Only seemed human (patristic-era; no single council)
Arianism Full deity A created being, not eternal Nicaea (325)
Apollinarianism Full humanity Had divine logos in place of human soul Constantinople I (381)
Nestorianism Personal unity Two persons, not one Ephesus (431)
Eutychianism / Monophysitism Distinct natures One blended nature Chalcedon (451)
Modalism / Sabellianism / Oneness Personal distinction Father / Son / Spirit are modes of one person (patristic-era; not a single council)

Briefer per-heresy notes:

  • Arianism (4th c. and modern Watchtower Christology). Christ as the highest creature but not God. Ēn pote hote ouk ēn, "there was when He was not." Refuted at Nicaea with homoousios (same substance with the Father). NT refutations: John 1.1; Colossians 2.9 (full deity); John 17.5 (pre-incarnate glory); Hebrews 1; John 1.18 (only-begotten God).
  • Docetism (1st-2nd c., Gnostic-derivative). Christ only seemed human; no real body. Opposed by Ignatius (Smyrnaeans 3, c. 110), Irenaeus (Against Heresies III), Tertullian (On the Flesh of Christ). NT refutations: John 1.14 ("the Word became flesh"); Luke 24.39 ("flesh and bones"); 1 John 4:1-3.
  • Modalism / Sabellianism / Oneness Pentecostalism. Father, Son, Spirit are not distinct persons but modes / roles / manifestations of one person. NT refutations: Jesus' baptism (Matt 3:16-17, Father's voice, Son in water, Spirit descending, three persons at once); the Son prays to the Father (Matt 26:39-42; John 17); the Father sends the Son (John 3:16); the Spirit proceeds from the Father (John 15:26). See Oneness Pentecostalism for the contemporary continuation.
  • Nestorianism. Two distinct persons in Christ, divine and human, joined in moral unity but not personally united. Refuted at Ephesus (431).
  • Eutychianism / Monophysitism. One blended nature, the human absorbed into the divine. Refuted at Chalcedon (451).
  • Apollinarianism. Full deity but only partial humanity, the divine logos replaced the human rational soul. Refuted at Constantinople I (381).

The continuing relevance of the heresies: each is alive in modified form today (Arianism in Jehovah's Witnesses; Modalism in Oneness Pentecostalism; Docetism in some New-Age "Cosmic Christ" theologies; Adoptionism / soft-Nestorianism in some liberal-Protestant Christologies; Apollinarianism in popular Christian piety that imagines Jesus as "God in a man-suit").

The deity of Christ, eight categories of biblical evidence

The case for Christ's full deity rests on eight convergent lines of evidence in the New Testament, building on the Old Testament YHWH-pattern.

1. Direct divine titles applied to Jesus.

2. Divine attributes ascribed to Jesus.

3. Divine works performed by Jesus.

4. Divine worship received by Jesus.

5. OT YHWH-titles transferred to Christ.

The "divine identity Christology" pattern (Bauckham, Jesus and the God of Israel, 2008):

6. Hostile-witness Christology.

Jesus' opponents understood His claims as divine. The hostile-witness principle: people most motivated to deny a claim correctly identifying what was claimed is strong evidence the claim was actually made.

  • John 5:18, the Jews sought to kill Him because He was "calling God His own Father, making Himself equal with God"
  • John 10:30-33, "for blasphemy; because You, being a man, make Yourself out to be God"
  • John 8:58-59, prin Abraam genesthai egō eimi → they picked up stones to kill Him
  • Mark 14:62-64, at the trial, Jesus's Daniel 7:13-14 "Son of Man" self-identification was judged blasphemy by the Sanhedrin

7. Christ's own claims.

8. Trinitarian formulas.

Christological lexicon entries

The Greek (and key Hebrew) vocabulary load-bearing for the doctrine of Christ: G3056 - logos, G2316 - theos, G2962 - kyrios, G5547 - christos, G3439 - monogenes, G4561 - sarx, G4637 - skenoo, G3962 - pater, G5207 - huios, G4138 - pleroma, G2320 - theotes, G1391 - doxa, G3686 - onoma, G1504 - eikon, H4899 - mashiach.

Christological rich-passage hubs

Christological arguments

Structured premise-conclusion arguments in: Liar Lunatic or Lord, Cumulative Case for the Deity of Christ, Trinity Coherence Defense (Latin-Thomist), Argument from the Resurrection, Argument from Prophecy Fulfillment, Modal Ontological Argument.

Scholarly works on Christology

Patristic. Athanasius, De Incarnatione; Discourses Against the Arians. Cyril of Alexandria, On the Unity of Christ. Augustine, De Trinitate. Irenaeus, Against Heresies III. Ignatius of Antioch, Smyrnaeans.

Reformation / classical. Calvin, Institutes II.12-17. Westminster Confession, ch. 8.

Modern conservative. Wayne Grudem, Systematic Theology, chs. 26-30. Stephen Wellum, God the Son Incarnate (2016). Bruce Ware, The Man Christ Jesus (2013). Robert Letham, The Holy Trinity (2004 / 2nd ed. 2019).

Bauckham / Hurtado divine-identity school. Richard Bauckham, God Crucified (1998); Jesus and the God of Israel (2008). Larry Hurtado, Lord Jesus Christ: Devotion to Jesus in Earliest Christianity (2003); How on Earth Did Jesus Become a God? (2005). Shifted the scholarly conversation by showing that the highest Christology was the earliest.

Anti-Watchtower / anti-Unitarian. Robert Bowman & Edward Komoszewski, Putting Jesus in His Place: The Case for the Deity of Christ (2007). James White, The Forgotten Trinity (1998). Ron Rhodes, Reasoning from the Scriptures with Jehovah's Witnesses (1993).

Part III, Christian Living (the practical-doctrinal shape)

The Christian package is not doctrine in the abstract, it issues in a way of life. Christian Living is downstream of Christian doctrine: the virtues are not free-floating moral ideals but the fruit of regeneration, the Spirit-empowered practice of the redeemed, and the participation in the divine life through union with Christ. This part of the hub orients the practical layer of the codex against the broader doctrinal scaffolding above.

The biblical virtues

The core virtues the New Testament treats as the operating shape of Christian character, each with its own dedicated hub:

Practical-theological hubs

The everyday operating frameworks the Christian life requires:

The Spirit-empowered shape of Christian life

The virtues are not produced by willpower alone; they are the fruit of the Spirit (Gal 5:22-23). The sanctification process (see Sanctification in Soteriology (Salvation)) is the lifelong cooperation with the Spirit's mortification of the flesh and vivification of the new creation in Christ.

The reality of struggle

Christian living is not the abolition of struggle. Concupiscence (the disordered inclination) persists in the redeemed; the lifelong battle of mortification + vivification is the normal Christian life, not an indicator of failure. See Concupiscence for the doctrinal grounding.

Distinctiveness against rival ethical frameworks

The Christian-living vision is substantively different from secular ethical alternatives, virtue ethics (Aristotelian without the telos in God), deontology (Kantian rule-keeping), utilitarianism (Mill / Bentham), expressivism (the contemporary therapeutic self). The Christian framework is teleological-theistic: the human good is union with God, and the virtues are the dispositional shape of that union.

Companion clusters

  • Evangelism, the witnessing-deployment cluster (formerly nested under Christian Living; promoted to its own layer-1 folder on 2026-05-23)
  • Prayer, the central Christian-living discipline; search-landing page
  • Spiritual Warfare, the practical-theological cluster on demonic-encounter and deliverance, paired with Authority to Cast Out Demons
  • Fivefold Ministry, the five Christ-given ministry offices (apostle, prophet, evangelist, pastor, teacher) plus the observed-but-not-listed Apologist role

Part IV, Position comparison vs other theistic and non-theistic positions

The structural-distinctives mapped against neighboring positions:

Position Classical-theistic God Trinity Incarnation Atonement Bodily resurrection of Christ Eschatological consummation
Christianity yes yes (three persons) yes (Christ Son of God incarnate) yes (Christ's death + resurrection reconciles) yes (third day after crucifixion) yes (Kingdom inaugurated + future consummation)
Jewish theism yes no (strict unitarianism) no partial (sacrificial-system; messiah-yet-to-come) no yes (Olam Ha-Ba; bodily resurrection at Messianic Age)
Islamic theism yes no (strict tawhid, Trinity explicitly rejected; see Q 4:171, 5:73) no (Jesus is prophet, not God; Q 4:171) no (no atonement-doctrine; salvation by submission + deeds) no (the crucifixion itself denied; see Crucifixion Denial in Islam Objection Defeater) yes (Day of Judgment; bodily resurrection; paradise / hell)
Deism yes (often weakened, no providence, no miracles) no no no no varies (often no)
Pantheism (varied) no (God identical with the cosmos) no no no no varies (often cyclic)
Panentheism (varied) weakened (cosmos is in God) varies varies varies varies varies
Process theology no (dipolar God; God in process) sometimes-attempted weakened weakened weakened weakened
Atheism no no no no no no
Naturalism no no no no no no

Christianity is structurally-distinct from each. It shares the classical-theistic-God commitment with Jewish and Islamic theism, but adds the Trinity-Incarnation-Atonement-Resurrection-Kingdom complex that the other monotheisms explicitly reject. It shares with Deism the existence-of-God claim, but rejects Deism's no-providence + no-miracles framework. It rejects Pantheism + Panentheism + Process theology on the classical-theistic-God-distinct-from-creation grounds. It rejects Atheism + Naturalism on every dimension.

Part V, The Christian distinctives, why Christianity is not just "monotheism with extras"

The Trinity-Incarnation-Atonement-Resurrection complex is not optional addition to a generic theistic core. It is structurally integrated:

  • The Trinity is the form of monotheism that makes Incarnation coherent. Strict unitarianism (Islamic / Jewish / Modalist) cannot accommodate a divine Son becoming incarnate without compromising divine unity. The Trinity solves this by holding that the Son is eternally God; the Incarnation is the Son taking on human nature in time. Without the Trinity, the Incarnation either becomes polytheism (a second God) or modalism (the Father temporarily becoming the Son).
  • The Incarnation is what makes Atonement possible. Only one who is fully God can bear the infinite weight of human sin; only one who is fully human can do so as humanity's representative. Anselm's Cur Deus Homo (c. 1098) is the classical articulation: the Atonement requires the God-man. Christ as God-only or as human-only cannot accomplish reconciliation.
  • The Atonement is what makes the Resurrection vindicating. Without sin to be borne, the Resurrection is merely a miracle; with sin borne at the cross, the Resurrection is vindication of completed atonement (Rom 4:25, Christ "was delivered up because of our transgressions, and was raised because of our justification").
  • The Resurrection is what makes the eschatological consummation real. Christ as firstfruits (1 Cor 15:20-23), his bodily resurrection is the down-payment guaranteeing the believer's bodily resurrection and the cosmic new creation. Without the Resurrection, eschatology is wishful thinking; with it, eschatology is already inaugurated.
  • And Christian Living is what makes the package visible. Doctrine without lived discipleship is dead orthodoxy; lived discipleship without doctrine is rootless moralism. The integrated Christianity package is doctrine and life as one organic whole.

Each piece needs the others. You cannot have one without all of them. This is why Christianity is a package, not a pick-and-mix.

Part VI, Biblical anchors

  • Genesis 1:1, "In the beginning God created the heavens and the earth", the creation-ex-nihilo foundation
  • Deuteronomy 6:4, the Shema: "Hear, O Israel: YHWH our God, YHWH is one", strict-monotheism anchor (read through Trinitarian elaboration without compromise)
  • Exodus 3:14, "I AM WHO I AM", divine self-naming; the metaphysical-aseity anchor; the LXX egō eimi ho ōn picked up by Jesus's Johannine "I AM" claims (John 8:58)
  • Isaiah 40-48, sustained doctrine-of-God passage; incomparability + creator + aseity + uniqueness
  • Isaiah 53, the suffering-servant passage; foundational for substitutionary atonement
  • Matthew 1:23 + Isaiah 7:14, Immanuel, "God with us", the Incarnation anchor
  • Matthew 16:13-20, Peter's confession; the church's founding-confession of Christ's divine identity
  • Matthew 22:37-40, the Great Commandment; love of God and neighbor as the law's fulfillment, the Christian-Living anchor
  • Matthew 28:18-20, the Great Commission with explicit Trinitarian baptismal formula
  • John 1:1-18, the prologue; the Logos who was God + Logos became flesh; Trinity + Incarnation anchor
  • John 14:9, "He who has seen Me has seen the Father", Incarnation as the definitive revelation of the Trinity
  • John 17, the high-priestly prayer; the immanent Trinity made narratively visible
  • Romans 1:18-21, see Romans 1.18-21, general revelation + suppression-of-truth; the apologetic-foundation anchor
  • Romans 3:21-26, "Christ Jesus, whom God displayed publicly as a propitiation in His blood through faith", atonement-theology condensed
  • Romans 5:12-21, see Inherited Guilt and Visiting Iniquity Objection Defeater, Adam-Christ federal-headship parallel
  • Romans 8:18-39, "nothing will be able to separate us from the love of God which is in Christ Jesus our Lord", assurance + eschatological hope
  • Romans 12:1-2, "present your bodies a living sacrifice…be transformed by the renewing of your mind", Christian-Living anchor
  • 1 Corinthians 8:6, proto-Trinitarian Shema (Bauckham's christological monotheism)
  • 1 Corinthians 13, the love hymn; the virtue-ethics anchor of Christian Living
  • 1 Corinthians 15:3-8, see the rich-hub 1 Corinthians 15.3-8, the pre-Pauline creed AD 35-38; the historical-foundation of the resurrection apologetic
  • Galatians 5:22-23, the fruit of the Spirit; the virtue-list anchoring Christian Living's biblical character
  • Philippians 2:5-11, the kenosis hymn; pre-existence + incarnation + death + exaltation; the most-compact Christological-narrative arc
  • Colossians 1:15-20, the Christological hymn
  • Hebrews 1:1-4, Hebrews's opening Christology
  • Revelation 1:8, "I am the Alpha and the Omega... the Almighty"
  • Revelation 21:3-4, the eschatological-consummation vision

Part VII, Patristic and historical development

The Christianity package was articulated over centuries through doctrinal-conciliar engagement:

  • 2nd century, the Apologists. Justin Martyr (First Apology, c. 155); Athenagoras; Theophilus of Antioch; Tatian. Defended Christianity against Roman state accusations and Greek-philosophical-pagan thought. Justin's Logos theology prepares the Trinitarian formulation.
  • 3rd century. Tertullian coins trinitas + persona + the Latin trinitarian vocabulary (Adversus Praxean, c. 213). Origen's Peri Archōn, eternal generation of the Son. Cyprian + Methodius on ecclesiology + sacraments.
  • Nicaea (325) and Constantinople I (381). The Trinitarian-conciliar settlement. Homoousios (consubstantial) Son with the Father. Holy Spirit affirmed as fully God. The Nicene-Constantinopolitan Creed (381) is the canonical-doctrinal statement of Christianity.
  • Cappadocians. Basil of Caesarea + Gregory of Nazianzus + Gregory of Nyssa, one ousia, three hypostases; the inseparability of operations.
  • Augustine. De Trinitate (c. 400-420); De Civitate Dei (c. 413-426); Confessions (c. 397-400), the comprehensive Christian-worldview articulation and the foundational Christian-Living spiritual autobiography.
  • Chalcedon (451). The Christological-conciliar settlement. The Hypostatic Union formula.
  • Constantinople II + III (553, 680-681). Further Christological clarifications (anti-monophysite, anti-monothelite).
  • Anselm. Monologion + Proslogion + Cur Deus Homo (c. 1078-1098), the ontological-argument seed + the satisfaction theory of atonement.
  • Aquinas. Summa Theologiae (c. 1265-1273), the high scholastic synthesis: Five Ways → divine simplicity → eternity → immutability → omnipotence → omniscience → Trinity → Incarnation → atonement → eschatology. The systematic-theology Christianity articulation.
  • Thomas à Kempis. The Imitation of Christ (c. 1418), the devotional-classic articulation of Christian Living.
  • Reformation. Luther + Calvin + Zwingli, preserve the classical-conciliar Christianity while clarifying soteriological-distinctives (justification by faith alone; sola scriptura); the Reformed scholastics (Turretin, Polanus) + Lutheran scholastics (Gerhard, Quenstedt) systematize.
  • 17th-18th century devotional / experiential. John Owen, The Mortification of Sin in Believers (1656); Of Communion with God (1657). The Puritan tradition's contribution to Christian Living.
  • 18th-19th centuries. Engagement with Enlightenment-skepticism: Pascal (Pensées); Butler (Analogy of Religion 1736); Paley (Natural Theology 1802); Newman (Grammar of Assent 1870); Schleiermacher; Kierkegaard.
  • 20th-21st centuries, analytic revival + Christian-Living renewal. C. S. Lewis (Mere Christianity 1952; Miracles 1947); Karl Barth (Church Dogmatics); Hans Urs von Balthasar; Cornelius Van Til; Alvin Plantinga (Warranted Christian Belief 2000); Richard Swinburne; William Lane Craig; N. T. Wright; Bonhoeffer (The Cost of Discipleship 1937); Eugene Peterson (A Long Obedience in the Same Direction 1980); Dallas Willard (The Spirit of the Disciplines 1988; Renovation of the Heart 2002); James K. A. Smith (You Are What You Love 2016); Tim Keller (Counterfeit Gods 2009; The Reason for God 2008); Edward Feser; Stephen C. Meyer.

Part VIII, Apologetic load

The Christianity package is defended at seven major engagement points (see Apologetics for the full method-comparison + Cumulative Case for Christian Theism for the integrated case):

  1. Classical-theistic foundation, see Doctrine: the cosmological + teleological + ontological + moral arguments terminate in a being with classical-theistic attributes. Engaged at Cosmological Arguments + Teleological Arguments + Moral Arguments + Ontological Arguments + Transcendental Argument for God.
  2. Trinitarian coherence, the Trinity is logically-coherent (not a contradiction); see Trinity + Trinity vs Oneness vs Modalism vs Arianism.
  3. Christological historicity, Jesus is a historical figure (Tacitus Annals 15.44; Josephus Antiquities 18.3.3 + 20.9.1; Pliny the Younger; Suetonius; the Talmud). See Historicity of Jesus.
  4. Resurrection historicity, the minimal-facts approach (Habermas + Licona). See 1 Corinthians 15.3-8 + N. T. Wright Resurrection of the Son of God (2003).
  5. Bible reliability, NT manuscript transmission (5,800+ Greek MSS); OT canon formation; archaeology + geography; fulfilled-prophecy (see Two-Stage Messianic Prophecy). Engages Bible Manuscript Reliability + NT Geographical Reliability.
  6. OT-difficult-text defeaters, ~16 OT-difficult-text defeaters in the codex. See Arguments Part-II.
  7. Engagement with rival worldviews, Islam (see Crucifixion Denial in Islam Objection Defeater + Tawhid); Judaism; Mormonism; Buddhism; Hinduism; Atheism; Naturalism.

Part IX, The Cumulative Case framework

Christianity is not defended by any single argument but by the convergence of multiple lines of evidence and argument combining to make it the most rationally-warranted overall worldview. The framework is abductive, inference to the best explanation across the full data set (cosmological + teleological + moral + ontological + historical-resurrection + religious-experience + meaning-of-life + intelligibility-of-the-world + transcendental). See Cumulative Case for Christian Theism for the synthesis aggregating ~54 built syllogisms into a single argumentative frame.

The cumulative-case structure is methodologically-honest: it does not claim Christianity is proved by any one argument. It claims that the conjunction of arguments + evidence + explanatory-power makes Christianity the best-supported worldview Bayesianly.

The discipline of defending it:

The doctrinal heart:

The lived practice:

The cumulative defensive case:

Comparative-religion engagement:

OT-and-NT-difficulty engagement:

Miracle-and-witness evidence:

See also