9:1-14 It is not new for a minister to meet with unkind returns for good-will to a people, and diligent and successful services among them. To the cavils of some, the apostle answers, so as to set forth himself as an example of self-denial, for the good of others. He had a right to marry as well as other apostles, and to claim what was needful for his wife, and his children if he had any, from the churches, without labouring with his own hands to get it. Those who seek to do our souls good, should have food provided for them. But he renounced his right, rather than hinder his success by claiming it. It is the people's duty to maintain their minister. He may wave his right, as Paul did; but those transgress a precept of Christ, who deny or withhold due support.

2. yet doubtless—yet at least I am such to you.

seal of mine apostleship—Your conversion by my preaching, accompanied with miracles ("the signs of an apostle," Ro 15:18, 19; 2Co 12:12), and your gifts conferred by me (1Co 1:7), vouch for the reality of my apostleship, just as a seal set to a document attests its genuineness (Joh 3:33; Ro 4:11).