The common experience/sharing of something with someone else. In the NT, the most common Greek word group to express this idea has the root koin- (“common”), with the cognate verb koinōneō, noun koinōnia, and adjective koinos. But the concept of fellowship extends well beyond this single word family and finds expression in a variety of different contexts.

Fellowship between the Members of the Trinity

The Gospel of John makes several claims about the fellowship that the members of the Trinity have experienced with each other from all eternity. Jesus claims, “I and the Father are one” (10:30) and “It is the Father, living in me, who is doing his work” (14:10). Regarding the Holy Spirit, Jesus says, “He will glorify me because it is from me that he will receive what he will make known to you. All that belongs to the Father is mine” (16:14–15). The Son has even shared in the Father’s glory from before the creation of the world (17:5). Within the unity of the Godhead, the individual members experience perfect fellowship as they share in the fullness of deity.

Fellowship between Jesus and Outcasts

During his earthly ministry, Jesus modeled God’s love for the marginalized by associating with them. Such fellowship often took the form of sharing meals with outcasts such as tax collectors and sinners (Mark 2:15–17; Luke 5:29–32; 7:36–50; 19:1–10), a practice that provoked sharp criticism from the Pharisees (Luke 15:1–2). In Luke 15:3–32, Jesus tells three parables in response to such criticism. These parables indicate that his fellowship with sinners demonstrates God’s love for the lost and the joy that comes from restored fellowship with God. Such table fellowship served as a foretaste of the eschatological messianic banquet, when all of God’s people (Jew and Gentile alike) will eat together in the kingdom of God as the fellowship of the forgiven (Matt. 8:11; Luke 13:29–30; Rev. 19:6–9).

Fellowship between Believers and God

The close and intimate fellowship that the members of the Trinity experience with one another is something that Jesus prays for his people to experience themselves (John 17:20–26). He asks that believers “may be one, Father, just as you are in me and I am in you. May they also be in us so that the world may believe that you have sent me” (17:21). Just as the Father is in Jesus and Jesus is in the Father, believers are described as being in both the Father and the Son. The stated purpose for such fellowship is twofold: that the world may know and believe that the Father has sent the Son, and that the Father loves believers even as he has loved the Son (17:21, 23). Central to this fellowship between God and believers is the sharing of the glory that the Father and the Son experience (17:22). Jesus expresses similar truths in John 15:1–11 when he speaks of himself as the true vine and his followers as the branches who must remain in him because “apart from me you can do nothing” (v. 5).

Although fellowship with God is something that Christ has purchased for his people through his death and resurrection, it can be broken by sin in the believer’s life: “If we claim to have fellowship with him and yet walk in the darkness, we lie and do not live out the truth” (1 John 1:6). When sin does break a believer’s fellowship with God, we are reassured, “If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness” (1:9). This restoration of fellowship is based on the work of Jesus to plead our case before the Father (2:1).

Paul frequently speaks of the believer’s fellowship with Christ, even though he rarely uses the word “fellowship” to speak of this reality. It is God who calls the believer into fellowship with Christ (1 Cor. 1:9), but such fellowship involves both the “power of his resurrection and participation in his sufferings, becoming like him in his death” (Phil. 3:10). When believers celebrate the Lord’s Supper, they are participating in the body and blood of Christ (1 Cor. 10:16–17). Far more frequently, Paul expresses the concept of fellowship with Christ by his use of the phrase “with Christ.” Believers have been crucified, buried, raised, clothed, and seated in the heavenly realms with Christ (Rom. 6:4–9; 2 Cor. 13:4; Gal. 2:20–21; Eph. 2:5–6; Col. 2:12–13; 3:1–4). They also share in the inheritance that Christ has received from the Father (Rom. 8:16–17) and one day will reign with him (2 Tim. 2:12).

Fellowship between Believers and Others

The fellowship that believers have with one another is an extension of their fellowship with God. John wrote, “We proclaim to you what we have seen and heard, so that you also may have fellowship with us. And our fellowship is with the Father and with his Son, Jesus Christ” (1 John 1:3). Just as walking in darkness falsifies a believer’s claim to fellowship with God, so also walking in the light is necessary for fellowship with other believers (1:6–7). Paul strikes a similar note when he says, “Do not be yoked together with unbelievers. For what do righteousness and wickedness have in common? Or what fellowship can light have with darkness? What harmony is there between Christ and Belial? Or what does a believer have in common with an unbeliever?” (2 Cor. 6:14–15). The point is not to avoid all contact with unbelievers (cf. 1 Cor. 5:9–10), but rather that the believer is so fundamentally identified with Christ that to identify with unbelievers should be avoided.

Because they are joined to Christ by faith, believers share a wide variety of experiences and blessings with each other. In the broadest sense, they share in the gospel and its blessings (1 Cor. 9:23; Phil. 1:5–7; Philem. 6; 2 Pet. 1:4), especially the Spirit (2 Cor. 13:13–14; Phil. 2:1). But the most common shared experience is suffering. When believers suffer because of their identification with Christ, they are said to share in Christ’s suffering (Phil. 3:10; 1 Pet. 4:13). In addition to this vertical element, there is a horizontal aspect. Because believers are united in one body (1 Cor. 12:12–13; Eph. 4:4–6), when one believer suffers, the entire body shares in that suffering (2 Cor. 1:7; Heb. 10:33; Rev. 1:9).

From the earliest days of the church, believers found very tangible ways to demonstrate that their fellowship was rooted in their common faith in Jesus. Immediately after Pentecost, “they devoted themselves to the apostles’ teaching and to fellowship, to the breaking of bread and to prayer. . . . All the believers were together and had everything in common” (Acts 2:42–44). This common experience led believers to voluntarily sell their possessions and share with any who had a need (2:45; 4:32). This meeting of very practical needs was motivated by a common experience of God’s abundant generosity in freely giving his Son (Rom. 8:32). The self-sacrificial sharing of resources became a staple of the early church (Rom. 12:13; Gal. 6:6; 1 Tim. 6:18) and provided an opportunity for Paul to demonstrate the unity of the church when he collected money from Gentile churches to alleviate the suffering of Jewish Christians in Judea (Rom. 15:26–27; 2 Cor. 8–9).

Conclusion

Biblical fellowship is not merely close association with other believers. The NT emphasizes what believers share in Christ rather than whom they share it with. True biblical fellowship between believers is an outworking of their fellowship with God through the gospel.