2 Corinthians 4:5

For we preach not ourselves (ou gar eautou khrussomen). Surely as poor and disgusting a topic as a preacher can find. But Christ Jesus as Lord (alla Criston Ihsoun Kurion). Kurion is predicate accusative in apposition. As your servants for Jesus' sake (doulou umwn dia Ihsoun). Your bond-slave for the sake of Jesus. This is the sufficient reason for any preacher's sacrifice, "for Jesus' sake."