FELLOWSHIP—sharing things in common with others. In the New Testament, fellowship has a distinctly spiritual meaning. Fellowship can be either positive or negative.
Positively, believers have fellowship with the Father, Son, and Holy Spirit (John 17:21-26; Phil. 2:1; 1 John 1:3), as well as with other believers (Acts 2:42, 1 John 1:3, 7). We have been welcomed warmly to fellowship with God, in the sense of sharing things in common with Him, for He has raised our status through the death and resurrection of Christ (Eph. 2:4-7). Believers are invited to share in common with God (1) a relationship as sons and daughters (John 1:12-13); His own holy character (1 Pet. 1:15), and the privileges of partnership with all things in Christ (Rom. 8:16; Eph. 2:6).
All who have fellowship with Christ also need to nurture fellowship with other believers (Heb. 10:25), a fellowship that illustrates the very nature of God Himself (John 13:35; Eph. 5:1-2; 1 John 1:5-10).
Conversely, believers are not to have fellowship with unbelievers. This means to not share in the world’s sinful lifestyle (2 Cor. 6:14-18). It does not mean to withdraw from society, for all believers are called to live and share the gospel with a blinded, unbelieving world (2 Cor. 4:1-7; Phil. 2:14-16).
Hayford, J. W., & Thomas Nelson Publishers. (1995). Hayford's Bible handbook
. Nashville: Thomas Nelson Publishers.