A.T. Robertson Commentary 2 Corinthians 4:5

"For we preach not ourselves, but Christ Jesus as Lord, and ourselves as your servants for Jesus` sake." — 2 Corinthians 4:5 (ASV)

For we preach not ourselves (ου γαρ εαυτους κηρυσσομεν). Surely as poor and disgusting a topic as a preacher can find.

But Christ Jesus as Lord (αλλα Χριστον Ιησουν Κυριον). Κυριον is predicate accusative in apposition.

As your servants for Jesus' sake (δουλους υμων δια Ιησουν). Your bond-slave for the sake of Jesus. This is the sufficient reason for any preacher's sacrifice, "for Jesus' sake."