He that speaketh of himself— If a person teaches what makes for the advancement of his own worldly interest, or for the gratification of his pride, or any other evil passion, the doers of the will of God will immediately know that such a teacher is an impostor; whereas, if a prophet proposes doctrines which have a tendency, through divine grace, to reform and regenerate mankind, and to advance the glory of God, without regard to the opinions of the world, or to his own interest, he must certainly be sent of God, and should not by any means be suspected of imposture; for so the word αδικια, in opposition to αληθης, true, most certainly signifies.
Related Commentaries of John 7:18
John 7:18
18 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.