I thank my God always concerning you for the grace of God which was given to you by Christ Jesus, 5 that you were enriched in everything by Him in all utterance and all knowledge, 6 even as the testimony of Christ was confirmed in you, 7 so that you come short in no gift, eagerly waiting for the revelation of our Lord Jesus Christ, 8 who will also confirm you to the end, that you may be blameless in the day of our Lord Jesus Christ. 9 God is faithful, by whom you were called into the fellowship of His Son, Jesus Christ our Lord. — 1 Corinthians 1:4-9.
Paul is going to address some cardinal practical issues of behaviour and so starts by emphasising God’s grace to them in Christ Jesus. He has enriched them, and will confirm them to the end. They are in fellowship with their faithful God through the gospel. [The Bible Panorama.]