I thank my God always concerning you for the grace of God which was given to you by Christ Jesus, that you were enriched in everything by Him in all utterance and all knowledge, even as the testimony of Christ was confirmed in you, so that you come short in no gift, eagerly waiting for the revelation of our Lord Jesus Christ, who will also confirm you to the end, that you may be blameless in the day of our Lord Jesus Christ. God is faithful, by whom you were called into the fellowship of His Son, Jesus Christ our Lord. 1 Corinthians 1:4–9 NKJV
Paul’s desire for the Corinthians was that grace and peace might be ministered to them. There was evidently a good deal of discord in their midst, which would have been eliminated had a larger measure of grace been among them. Yet the grace of God had been ministered to them in Christ, as verse 4 states, and that moved him to thanksgiving. Moreover, from the grace of God had sprung all the gifts that they possessed, while waiting for the coming of the Lord. The God who had called them to the fellowship of His Son is faithful as well as gracious, and consequently he was confident that they would be confirmed without blame to the end.
Notice how repeatedly the Lord Jesus Christ is named in the first nine verses, and how everything is attributed to, and referred to, Him. It is His Name, His grace, His testimony, His coming, His day, His fellowship.
When David was at Adullam in the time of his rejection, men flocked to his standard, and he became captain over them. They entered his fellowship, for he was the central figure (1 Sam. 22:1–2). Had he been smitten, the fellowship would have ceased to be. We are called into the fellowship of One who also is in rejection, yet is infinitely greater than David. The One who is Captain over us is God’s Son. The fellowship to which we belong is dominated by Him, without a rival.