NICHOLAS: I laud your remarks. And I add that also in another manner Aristotle closed off to himself a way for viewing the truth. For, as we mentioned earlier, he denied that there is a Substance of substance or a Beginning of beginning. Thus, he would also have denied that there is a Contradiction of contradiction. But had anyone asked him whether he saw contradiction in contradictories, he would have replied, truly, that he did. Suppose he were thereupon asked: “If that which you see in contradictories you see antecedently (just as you see a cause antecedently to its effect), then do you not see contradiction without contradiction?” Assuredly, he could not have denied that this is so. For just as he saw that the contradiction in contradictories is contradiction of the contradictories, so prior to the contradictories he would have seen Contradiction before the expressed contradiction (even as the theologian Dionysius saw God to be, without opposition, the Oppositeness of opposites; for prior to [there being any] opposites it is not the case that anything is opposed to oppositeness). But even though the Philosopher failed in first philosophy, or mental philosophy, nevertheless in rational and moral [philosophy] he wrote many things very worthy of complete praise. Since these things do not belong to the present speculation, let it suffice that we have made the preceding remarks about Aristotle.
Nicholas of Cusa, De Li Non Aliud (‘On God as Not-Other’), 1461-2, in Nicholas of Cusa on God as Not-other, Trans., Jasper Hopkins, The Arthur J. Banning Press, Minneapolis, 1999, 1108-1166, 89, 1150