Tractates on the Gospel of John

¹ You who were present yesterday, bear in mind that we were a long while discoursing of the words of our Lord Jesus Christ, where He says, “I am the light of the world: he that follows me shall not walk in darkness, but shall have the light of life;” and if we wished to go on discoursing of that light, we might still speak a long time; for it would be impossible for us to expound the matter in brief. Therefore, my brethren, let us follow Christ, the light of the world, that we may not be walking in darkness. We must fear the darkness—not the darkness of the eyes, but that of the moral character; and even if it be the darkness of the eyes, it is not of the outer, but of the inner eyes, of those by which we discern, not between white and black, but between right and wrong.