For we preach not ourselves (ou gar heautous kērussomen). Surely as poor and disgusting a topic as a preacher can find.
But Christ Jesus as Lord (alla Christon Iēsoun Kurion). Kurion is predicate accusative in apposition.
As your servants for Jesus’ sake (doulous humōn dia Iēsoun). Your bond-slave for the sake of Jesus. This is the sufficient reason for any preacher’s sacrifice, “for Jesus’ sake.”