trine of my philosophy could fairly be added to such a list, because each of them has been thought out in the presence of the perceived reality, and none of them has its root in abstract conceptions alone. There is yet in it a fundamental thought which is applied to all the phenomena of the world as their key; but it proves itself to be the right alphabet at the application of which all words and sentences have sense and significance. The discovered answer to a riddle shows itself to be the right one by the fact that all that is said in the riddle is suitable to it. In the same way my doctrine introduces agreement and connection into the confusion of the contrasting phenomena of this world, and solves the innumerable contradictions which, when regarded from any other point of view, it presents. Therefore, so far, it is like a sum that comes out right, yet by no means in the sense that it leaves no problem over to solve, no possible question unanswered. To assert anything of that sort would be a presumptuous denial of the limits of human knowledge in general. Whatever torch we may kindle, and whatever space it may light, our horizon will always remain bounded by profound night. For the ultimate solution of the riddle of the world must necessarily be concerned with the things in themselves, no longer with the phenomena. But all our forms of knowledge are adapted to the phenomena alone; therefore we must comprehend everything through coexistence, succession, and causal relations. These forms, however, have meaning and significance only with reference to the phenomenon; the things in themselves and their possible relations cannot be apprehended by means of those forms. Therefore the actual, positive solution of the riddle of the world must be something that human intellect is absolutely incapable of grasping and thinking; so that if a being of a higher kind were to come and take all pains to impart it to us, we would be absolutely incapable of understanding anything of his expositions. Those, therefore, who pro-
