Lexicon

G1577 - ekklesia

Strong's: G1577 · BLB lookup Pronunciation: ek-klay-see'-ah Part of speech: feminine noun Root: ek- (out of) + kaleō (to call), "called-out-ones" / "assembly summoned out" LXX equivalent: renders Hebrew qahal (assembly / congregation, H6951) NT occurrences: 114

Semantic range

Assembly / gathering, secular Greek sense (Acts 19:32, 39, 41, the Ephesian ekklēsia / town assembly)
The OT congregation of Israel (in LXX-derived NT use; e.g., Acts 7:38, "the ekklēsia in the wilderness")
The Christian church, local assembly of believers (most NT uses)
The universal church, all believers everywhere across time, the body of Christ

Theological force, what is the church?

Etymology vs usage

The etymology ek + kaleō ("called out") is sometimes overemphasized as "the called-out ones." But in Greek usage, ekklēsia simply meant assembly, the Athenian political assembly was called ekklēsia. The "called-out" theological emphasis is real but should not be derived purely from etymology; it is theological-NT-development.

The NT theological force comes from the content of NT ekklēsia usage:

The ekklēsia belongs to Christ ("My ekklēsia", Matthew 16:18)
It is the body of Christ (G4983 - soma / 1 Cor 12:12-27; Eph 1:22-23)
It is built on apostolic-foundation (Eph 2:20)
It is animated by the Spirit (Acts 2:42-47; 1 Cor 12)
It is the bride of Christ (Eph 5:25-32; Rev 19:7-8)
It is a temple in which God dwells (Eph 2:19-22; 1 Cor 3:16-17; 1 Pet 2:4-5)

Local and universal ekklēsia

Two NT senses converge:

Local ekklēsia, a specific congregation gathering in a specific place ("the ekklēsia in your house", Romans 16:5; "the ekklēsia of the Thessalonians", 1 Thess 1:1)
Universal ekklēsia, the corporate body of all believers ("Christ also loved the ekklēsia and gave Himself up for her", Eph 5:25)

The two are organically related: the local ekklēsia is the manifestation of the universal ekklēsia in a specific place.

Christ as the head of the ekklēsia

The most important Christological-ecclesiological text is Matthew 16:18:

"I will build My ekklēsian, and the gates of Hades will not overpower it."

This is the first NT ekklēsia use. Christ:

Owns the ekklēsia, "My church"
Builds the ekklēsia, He is the active agent
Promises invincibility, Hades cannot overpower it

The Catholic / Protestant dispute over epi tautē tē petra, "on this rock", engages whether Peter himself, or his confession of Christ as the Christ, is the rock on which the ekklēsia is built. Conservative Protestant: the rock is Peter's confession (or Christ Himself, the Rock per 1 Cor 10:4). Roman Catholic: Peter himself is the rock; from Peter the papal succession.

The four classical marks of the church

Drawing on the Nicene Creed: one, holy, catholic, apostolic:

One, corporate unity in Christ (John 17.22 / Eph 4:4-6, one body, one Spirit, one Lord, one faith, one baptism, one God and Father)
Holy, set apart in Christ; sanctified (Eph 5:26-27)
Catholic, universal scope, embracing all peoples (Galatians 3.28, neither Jew nor Greek; Matthew 28.19, make disciples of all nations)
Apostolic, built on apostolic foundation (Eph 2:20); preserving apostolic doctrine

Ekklēsia and the OT qahal

The LXX renders qahal (the assembly of Israel) with ekklēsia. NT writers therefore use ekklēsia with this OT-Israel-continuity background. The church is not a complete novelty; it is the eschatological-fulfillment of God's covenant people, now redefined around Christ rather than ethnic Israel.

This grounds:

Continuity with OT covenant community
Discontinuity in that ethnic Israel-membership is not the criterion (Galatians 3.28)
The "Israel of God" (Gal 6:16), debated; either ethnic Israel + Gentile Christians, or the church-as-true-Israel

Ecclesiology, Protestant frameworks

Major Reformed / evangelical ecclesiological positions:

Marks of a true church (Reformation)

Right preaching of the Word (Calvin, Institutes IV.1.9)
Right administration of the sacraments (baptism + Lord's Supper)
Right exercise of church discipline (Belgic Confession art. 29)

Government structures

Episcopalian, bishops in apostolic succession
Presbyterian, elder-led, connectional
Congregational, autonomous local congregations
Independent / non-denominational, modern variants

Membership

Visible / invisible distinction (Augustine; Calvin), the visible church contains both true believers and hypocrites; the invisible church is the elect

Apologetic significance

Ekklēsia anchors:

The church as God's covenant people, universal yet local
Christ's authority over the church, the church is not autonomous human institution
Apostolic-foundation grounding, preserving doctrine
Mission scope, the ekklēsia exists for the world (the Great Commission)
The visible-witness-to-Christ in the world

Notable verses

Matthew 16:18, "I will build My ekklēsian"
Matthew 18:17, church discipline; tell it to the ekklēsia
Acts 2:47, Lord adding to the ekklēsia
Acts 9:31, ekklēsia throughout Judea, Galilee, Samaria
Acts 11:26, disciples first called Christians at Antioch (in the ekklēsia)
Acts 20:28, "the ekklēsian of God which He purchased with His own blood"
Romans 16, multiple local ekklēsiai greeted
1 Corinthians 12:28, "in the ekklēsia God has appointed first apostles, second prophets, third teachers"
Ephesians 1:22-23, Christ as head over all things to the ekklēsia, His body
Ephesians 3:10, manifold wisdom of God made known through the ekklēsias
Ephesians 5:23-32, Christ and the ekklēsia / husband and wife typology
Colossians 1:18, 24, Christ as head of the ekklēsias
1 Timothy 3:15, "the ekklēsia of the living God, the pillar and support of the truth"
Hebrews 12:23, "the ekklēsia of the firstborn enrolled in heaven"
1 Peter 5:2, shepherd the flock of God among you
Revelation 1-3, the seven ekklēsiai of Asia Minor

Patristic / scholarly note

Patristic ecclesiology developed from apostolic-mode (Acts; Pastoral Epistles) through:

Ignatius of Antioch (To the Smyrnaeans), early bishop / elder / deacon distinction
Cyprian (De Ecclesiae Unitate), extra ecclesiam nulla salus
Augustine, visible / invisible church distinction
The conciliar tradition, Nicaea, Constantinople, Chalcedon

Reformation: Calvin (Institutes IV); Luther (The Bondage of the Will; On the Councils and the Church); the Westminster Confession ch. 25.

Modern conservative: Wayne Grudem (Systematic Theology ch. 44-51); Edmund Clowney (The Church, 1995); Mark Dever (Nine Marks of a Healthy Church, 2000); Jonathan Leeman (The Church and the Surprising Offense of God's Love, 2010).

Notes

Lexical workspace for ekklēsia.