Ambrosiaster : Paul indicates here that his position corresponds to the teaching of Scripture and that his refusal to accept any payment from the Corinthians was with good reason. — COMMENTARY ON PAUL'S EPISTLES John Chrysostom : Having shewn, as you see, both from the Apostles, that it is not forbidden the teacher to receive, and from illustrations found in common life, he proceeds also to a third head, thus saying, "Do I speak these things after the manner of men? or saith not the law also the same?" For since he had hitherto alleged nothing out of the Scriptures, but put forward the common custom; "think not," saith he, "that I am confident in these alone, nor that I go to the opinions of men for the ground of these enactments. For I can shew that these things are also well-pleasing to God, and I read an ancient law enjoining them." Wherefore also he carries on his discourse in the form of a question, which is apt to be done in things fully acknowledged; thus saying, "Say I these things after the manner of men?" i.e. "do I strengthen myself only by human examples?" "or saith not the law also the same?" — Homily on 1 Corinthians 21