Fellowship

(Gk. koinōnia) (1:9; Acts 2:42; Phil. 2:1; 1 John 1:3, 6, 7) Strong’s #2842

The Greek term means “that which is shared in common.” In the NT the word was used to denote the believers’ common participation in the Triune God—the Father, the Son, and the Holy Spirit. The Father and Son have enjoyed communion with each other before the creation of the world. When the Son entered into time, His fellowship with the Father also entered into time. During the days of His ministry, Jesus was introducing the Father to the disciples and initiating them into this fellowship. Then once the disciples were regenerated unto eternal life, they actually entered into fellowship with the Father and the Son. Thus the unique fellowship between the Father and the Son began in eternity was manifested in time through the incarnation of the Son, was introduced to the apostles, and then through the apostles was extended to each and every believer through the indwelling of the Holy Spirit (2 Cor. 13:14; Phil. 2:1).

Taken from NKJV Study Bible