I thank my God always on your behalf, for the grace of God which is given you by Jesus Christ;
He puts foremost the causes for praise and hope among them, not to discourage them by the succeeding reproof, and in order to appeal to their better selves.
My God (Romans 1:8) - mine, as honouring me by having blessed the building of which I laid the foundation (1 Corinthians 3:6-10).
Always - (cf. Philippians 1:3-4.)
The grace ... given you - (cf. 1 Corinthians 1:7.)
By ... Christ - literally, IN Christ; given you as members in Christ.