John Chrysostom
Catena Aurea · Johannesevangelium 7
Now about the midst of the feast Jesus went up into the temple, and taught. And the Jews marvelled, saying, How knoweth this man letters, having never learned? Jesus answered them, and said, My doctrine is not mine, but his that sent me. If any man will do his will, he shall know of the doctrine, whether it be of God, or whether I speak of myself. He that speaketh of himself seeketh his own glory: but he that seeketh his glory that sent him, the same is true, and no unrighteousness is in him.
(Hom. xlix. 1) This is as much as to say, Put away the anger, envy, and hatred which you have towards Me, and there will be nothing to prevent your knowing, that the words which I speak are from God. Then He brings in an irresistible argument taken from human experience: He that speaketh of himself, seeketh his own glory: as if to say, He who aims at establishing some doctrine of his own, does so for no purpose, but to get glory. But I seek the glory of Him that sent me, and wish to teach you for His, i. e. another’s, sake: and then it follows, But he that seeketh His glory that sent Him, the same is true, and there is no unrighteousness in Him.