1. The Lord says, as you have just been hearing, “He that hateth me, hateth my Father also:” and yet He had said a little before, “These things will they do unto you, because they know not Him that sent me.” A question therefore arises that cannot be overlooked, how they can hate one whom they know not? For if it is not God as He really is, but something else, I know not what, that they suspect or believe Him to be, and hate this; then assuredly it is not God Himself that they hate, but the thing they conceive in their own erroneous suspicion or baseless credulity; and if they think of Him as He really is, how can they be said to know Him not? It may be the case, indeed, with regard to men, that we frequently love those whom we have never seen; and in this way it can, on the other hand, be none the less impossible that we should hate those whom we have never seen. The report, for instance, whether good or bad, about some preacher, leads us not improperly to love or to hate the unknown. But if the report is truthful, how can one, of whom we have got such true accounts, be spoken of as unknown? Is it because we have not seen his face? And yet, though he himself does not see it, he can be known to no one better than to himself. The knowledge of any one, therefore, is not conveyed to us in his bodily countenance, but only lies open to our apprehension when his life and character are revealed. Otherwise no one would be able to know himself, because unable to see his own face. But surely he knows himself more certainly than he is known to others, inasmuch as by inward inspection he can the more certainly see what he is conscious of, what he desires, what he is living for; and it is when these are likewise laid open to us, that he becomes truly known to ourselves. And as these, accordingly, are commonly brought to us regarding the absent, or even the dead, either by hearsay or correspondence, it thus comes about that people whom we have never seen by face (and yet of whom we are not entirely ignorant), we frequently either hate or love.
Complete source paragraph · Tractates on the Gospel of John, Tractate 90, source paragraph 3 · Original source