May you experience unearned favor and peace from God our Father and the Lord Jesus Christ.

I always thank God for you, [especially] for God's unearned favor that was given to you [in providing salvation and blessings] in Christ Jesus.

Using the unearned favor shown to me by God [Note: Paul here probably refers to his apostleship and its attending spiritual gifts], as an expert building contractor, I laid the foundation [i.e., in starting the Corinthian church], and someone else is building on it [i.e., Apollos. See verse 6].

But I am whatever I am because of God's unearned favor, and the favor He showed me was not for nothing [i.e., Paul made the most of his conversion by being extra diligent in his service to God]. But I worked harder than all the other apostles, yet it was not I, but God's favor on me [that accomplished it].

May the unearned favor of the Lord Jesus Christ [continue to] be with you.