Terminology

The NT word for “church” is ekklēsia, which means “gathering, assembly, congregation.” In classical Greek the term was used almost exclusively for political gatherings. In particular, in Athens the word signified the assembling of the citizens for the purpose of conducting the affairs of the city. Moreover, ekklēsia referred only to the actual meeting, not to the citizens themselves. When the people were not assembled, they were not considered to be the ekklēsia. The NT records three instances of this secular usage of the term (Acts 19:32, 39, 41).

The most important background for the Christian use of the term is the LXX (Greek translation of the Hebrew Scriptures, dated c. 250 BC), which uses the word in a religious sense about one hundred times, almost always as a translation of the Hebrew word qahal. While qahal does not indicate a secular gathering (in contrast to ’edah, the typical Hebrew word for Israel’s religious gathering, translated by Greek synagōgē), it does denote Israel’s sacred meetings. This is especially the case in Deuteronomy, where qahal is linked with the covenant.

In the NT, ekklēsia is used to refer to the community of God’s people 109 times (out of 114 occurrences of the term). Although the word occurs in only two Gospel passages (Matt. 16:18; 18:17), it is of special importance in Acts (23 times) and the Pauline writings (46 times). It is found 20 times in Revelation and in isolated instances in James and Hebrews. Three general conclusions can be drawn from this usage. First, ekklēsia (in both the singular and the plural) applies predominantly to a local assembly of those who profess faith in and allegiance to Christ. Second, ekklēsia designates the universal church (Acts 8:3; 9:31; 1 Cor. 12:28; 15:9; especially in the later Pauline letters: Eph. 1:22–23; Col. 1:18). Third, the ekklēsia is God’s congregation (1 Cor. 1:2; 2 Cor. 1:1).

The Nature of the Church

The nature of the church is too broad to be exhausted in the meaning of one word. To capture its significance, the NT authors utilize a rich array of metaphorical descriptions. Nevertheless, there are those metaphors that seem to dominate the biblical pictures of the church, five of which call for comment: the people of God, the kingdom of God, the eschatological temple of God, the bride of Christ, and the body of Christ.

The people of God. Essentially, the concept of the people of God can be summed up in the covenantal phrase: “I will be their God, and they will be my people” (see Exod. 6:6–7; 19:5; Lev. 26:9–14; Jer. 7:23; 30:22; 32:37–40; Ezek. 11:19–20; 36:22–28; Acts 15:14; 2 Cor. 6:16; Heb. 8:10–12; Rev. 21:3). Thus, the people of God are those in both the OT and the NT eras who responded to God by faith and whose spiritual origin rests exclusively in God’s grace.

To speak of the one people of God transcending the eras of the OT and the NT necessarily raises the question of the relationship between the church and Israel. Modern interpreters prefer not to polarize the matter into an either/or issue. Rather, they talk about the church and Israel in terms of there being both continuity and discontinuity between them.

Continuity between the church and Israel. Two ideas establish the fact that the church and Israel are portrayed in the Bible as being in a continuous relationship. First, in the OT the church was present in Israel in some sense. Acts 7:38 suggests this connection when, alluding to Deut. 9:10, it speaks of the church (ekklēsia) in the wilderness. The same idea is probably to be inferred from the intimate association noted earlier existing between the words ekklēsia and qahal, especially when the latter is qualified by the phrase “of God.” Furthermore, if the church is viewed in some NT passages as preexistent, then one finds therein the prototype of the creation of Israel (see Exod. 25:40; Acts 7:44; Gal. 4:26; Heb. 12:22; Rev. 21:11; cf. Eph. 1:3–14).

Second, Israel in some sense is present in the church in the NT. The many OT names for Israel applied to the church in the NT establish that fact. Some of those are “Israel” (Gal. 6:15–16; Eph. 2:12; Heb. 8:8–10; Rev. 2:14), “a chosen people” (1 Pet. 2:9), “the circumcision” (Rom. 2:28–29; Phil. 3:3; Col. 2:11), “Abraham’s seed” (Rom. 4:16; Gal. 3:29), “the remnant” (Rom. 9:27; 11:5–7), “the elect” (Rom. 11:28; Eph. 1:4), “the flock” (Acts 20:28; Heb. 13:20; 1 Pet. 5:2), and “priesthood” (1 Pet. 2:9; Rev. 1:6; 5:10).

Discontinuity between the church and Israel. The church, however, is not totally identical with Israel; discontinuity also characterizes the relationship. The church, according to the NT, is the eschatological (end-time) Israel incorporated in Jesus Christ and, as such, is a progression beyond historical Israel (1 Cor. 10:11; 2 Cor. 5:14–21). Indeed, significant discontinuity is introduced by the fact that the church includes Gentiles as members of Israel, without requiring them to convert to Judaism first. Gentiles enter as Gentiles. However, a caveat must be issued at this point. Although the church is a progression beyond Israel, it does not seem to be the permanent replacement of Israel (see Rom. 9–11, esp. 11:25–27).

The kingdom of God. Many scholars have maintained that the life, death, and resurrection of Jesus inaugurated the kingdom of God, producing the overlapping of the two ages. The kingdom has already dawned but is not yet complete. The first aspect pertains to Jesus’ first coming, and the second aspect relates to his second coming. In other words, the age to come has broken into this age, and now the two exist simultaneously. This background is crucial in ascertaining the relationship between the church and the kingdom of God, because the church also exists in the tension that results from the overlapping of the two ages. Accordingly, one may define the church as the foreshadowing of the kingdom. Two ideas flow from this definition: first, the church is related to the kingdom of God; second, the church is not equal to the kingdom of God.

The church and the kingdom of God are related. Not until after the resurrection of Jesus does the NT speak with regularity about the church. However, there are early signs of the church in the teaching and ministry of Jesus, in both general and specific ways. In general, Jesus anticipated the later official formation of the church in that he gathered to himself the twelve disciples, who constituted the beginnings of eschatological Israel—in effect, the remnant. More specifically, Jesus explicitly referred to the church in two passages: Matt. 16:18–19; 18:17. In the first passage Jesus promised that he would build his church despite satanic opposition, thus assuring the ultimate success of his mission. The notion of the church overcoming the forces of evil coincides with the idea that the kingdom of God will prevail over its enemies and bespeaks the intimate association between the church and the kingdom. The second passage relates to the future organization of the church, not unlike the Jewish synagogue practices of Jesus’ day.

The church and the kingdom of God are not identical. As intimately related as the church and the kingdom of God are, the NT does not equate the two, as is evident in the fact that the early Christians preached the kingdom, not the church (Acts 8:12; 19:8; 20:25; 28:23, 31). The NT identifies the church as the people of the kingdom (e.g., Rev. 5:10), not the kingdom itself. Moreover, the church is the instrument of the kingdom. This is especially clear from Matt. 16:18–19, where the preaching of Peter and the church become the keys to opening up the kingdom of God to all who would enter.

The eschatological temple of God. Both the OT and Judaism anticipated the rebuilding of the temple in the future kingdom of God (e.g., Ezek. 40–48; Hag. 2:1–9; 1 En. 90:29; 91:3; Jub. 1:17, 29). Jesus hinted that he was going to build such a structure (Matt. 16:18; Mark 14:58; John 2:19–22). Pentecost witnessed to the beginning of the fulfillment of that dream in that when the Spirit inhabited the church, the eschatological temple was formed (Acts 2:16–36). Other NT writers also perceived that the presence of the Spirit in the Christian community constituted the new temple of God (1 Cor. 3:16–17; 2 Cor. 6:14–7:1; Eph. 2:19–22; see also Gal. 4:21–31; 1 Pet. 2:4–10). However, that the eschatological temple is not yet complete is evident in the preceding passages, especially in their emphasis on the need for the church to grow toward maturity in Christ, which will be fully accomplished only at the parousia (second coming of Christ). In the meantime, Christians, as priests of God, are to perform their sacrificial service to the glory of God (Rom. 12:1–2; Heb. 13:15; 1 Pet. 2:4–10).

The bride of Christ. The image of marriage is applied to God and Israel in the OT (see Isa. 54:5–6; 62:5; Hos. 2:7). Similar imagery is applied to Christ and the church in the NT. Christ, the bridegroom, has sacrificially and lovingly chosen the church to be his bride (Eph. 5:25–27). Her responsibility during the betrothal period is to be faithful to him (2 Cor. 11:2; Eph. 5:24). At the parousia the official wedding ceremony will take place, and with it the eternal union of Christ and his wife will be actualized (Rev. 19:7–9; 21:1–2).

The body of Christ. The body of Christ as a metaphor for the church is unique to the Pauline literature and constitutes one of the most significant concepts therein (Rom. 12:4–5; 1 Cor. 12:12–27; Eph. 4:7–16; Col. 1:18). The primary purpose of the metaphor is to demonstrate the interrelatedness of diversity and unity within the church, especially with reference to spiritual gifts. The body of Christ is the last Adam (1 Cor. 15:45), the new humanity of the end time that has appeared in history. However, Paul’s usage of the image, like the metaphor of the new temple, indicates that the church, as the body of Christ, still has a long way to go spiritually. It is not yet complete.

Sacraments

At the heart of the expression of the church’s faith are the sacraments of baptism and the Lord’s Supper. The former symbolizes entrance into the church, while the latter provides spiritual sustenance for the church.

Baptism. Baptism symbolizes the sinner’s entrance into the church. Three observations emerge from the biblical treatment of this sacrament. First, the OT intimated baptism, especially in its association of repentance of sin with ablutions (Num.19:18–22; Ps. 51:7; Ezek. 36:25; cf. John 3:5). Second, the baptism of John anticipated Christian baptism. John administered a baptism of repentance in expectation of the baptism of the Spirit and fire that the Messiah would exercise (Matt. 3:11 // Luke 3:16). Those who accept Jesus as Messiah experience the baptism of fire and judgment (which may be an allusion to undergoing the great tribulation/messianic woes that lead into the messianic kingdom). Third, the early church practiced baptism in imitation of the Lord Jesus (Matt. 3:13–17 // Mark 1:9–11 // Luke 3:21–22; see also John 1:32–34; cf. Matt. 28:19; Acts 2:38; 8:16; Rom. 6:3–6; 1 Cor. 1:13–15; Gal. 3:27; Titus 3:5; 1 Pet. 3:21). These passages demonstrate some further truths about baptism: baptism is intimately related to faith in God; baptism identifies the person with the death and resurrection of Jesus; baptism incorporates the person into the community of believers.

Lord’s Supper. The other biblical sacrament is the Lord’s Supper. This rite symbolizes Christ’s spiritual nourishment of his church as it celebrates the sacred meal. Two basic points emerge from the biblical data concerning the Lord’s Supper. First, it was instituted by Christ (Matt. 26:26–29; Mark 14:22–25; Luke 22:15–20; 1 Cor. 11:23–25), probably as an adaptation of the Passover meal. If that is the case, then, Jesus will have introduced two changes into the Passover seder: he replaced the unleavened bread with a reference to his body being given for us on the cross; he replaced the cup of redemption with a reference to his shed blood on the cross, the basis of the new covenant. Second, the early church practiced the Lord’s Supper probably weekly, in conjunction with the love feast (see 1 Cor. 11:18–22; cf. Jude 12). A twofold meaning is attached to the Lord’s Supper by the NT authors. First, it involves participation in Christ’s salvation (Luke 22:19; 1 Cor. 11:24–25), and in two ways: participating in the Lord’s Supper looks back to the death of Jesus, in which the believer now shares; participating in the Lord’s Supper looks forward to Christ’s return, the culmination point of the believer’s salvation. Second, the Lord’s Supper involves identification with the body of Christ, the community of faith (1 Cor. 10:16–17; 11:27–33).

Worship

The ultimate purpose of the church is to worship God through Christ and in the power of the Holy Spirit (see, e.g., Rev. 4–5). The early church first worshiped in the Jerusalem temple (Acts 2:46; 3:1; 5:42) as well as in the synagogue (Acts 22:19; cf. John 9:22; James 2:2). At the same time, and into the near future, believers met in homes for worship (Acts 1:13; 2:46; 5:42; cf. Rom. 16:15; Col. 4:15; Philem. 2; 2 John 10; 3 John 1, 6). Although many Jewish Christians no doubt continued to worship God on the Sabbath, the established time for the church’s worship came to be Sunday, the day of Jesus’ resurrection (Acts 20:7; Rev. 1:10). The early church most probably patterned its order of worship after the synagogue service: praise in prayer (Acts 2:42, 47; 3:1; 1 Thess. 1:2; 5:17) and in song (1 Cor. 14:26; Phil. 2:6–11; Col. 1:15–20), the expounding of Scripture (Acts 2:42; 6:4; Col. 4:16; 1 Thess. 2:13; 1 Tim. 4:13), and almsgiving to the needy (Acts 2:44–45; 1 Cor. 16:1–2; 2 Cor. 8–9; James 2:15–17).

Service and Organization

Five observations emerge from the NT regarding the service and organization of the early church. First, the ministry of the church centers on its usage of spiritual gifts, which are given to believers by God’s grace and for his glory as well as for the good of others (Rom. 12:3; Eph. 4:7–16). Second, every believer possesses a gift of the Spirit (1 Cor. 12:7; Eph. 4:7). Third, it is through the diversity of the gifts that the body of Christ matures and is unified (Rom. 12:4; 1 Cor. 12:12–31; Eph. 4:17–18). Fourth, although there was organized leadership in the NT church, including elders (1 Tim. 3:1–7 [also called “pastors” and “bishops”; see Acts 20:17, 28; 1 Pet. 5:1–4]) and deacons (1 Tim. 3:8–13), there does not seem to have been a gap between the “clergy” and the “laity” in the church of the first century; rather, those with the gift of leadership are called to equip all the saints for the work of the ministry (Eph. 4:7–16). Fifth, spiritual gifts are to be exercised in love (1 Cor. 13).