I thank my God. — Expressions of thankfulness (1 Corinthians 1:4-9), serving also to secure at the very outset the attention of those to whom the Apostle is writing. He thus shows that he is not blind to, or forgetful of, their good qualities, although this Epistle is specially written to rebuke their present sins; and also that he is not about to utter words of hopeless condemnation, but of wholesome warning. The emphatic use of the singular, I thank my God, in contrast to the plural in the previous verses, indicates that St. Paul does not join Sosthenes with him as author of the Epistle, but that it is written in his name alone and with his sole authority.
The grace of God which is given you by Jesus Christ. — Better, the grace of God given you in Christ Jesus — i.e., given to you as being in Christ.