At last I gave it up in despair, but I had fully made up my mind that as soon as I went to the University I would find out what philosophy really was, and what Kant meant by saying that space and time were forms of our sensuous intuition. I see that, accordingly, in the summer of 1841, I attended lectures on Aesthetics by Professor Weisse, on Anthropology by Lotze, and on Psychology by Professor Heinroth, and I slowly learnt to distinguish between what was going on within me, and what I had been led to imagine existed outside me, or at least quite independent of me. But before I had got a firm grasp of Kant, of his forms of intuition, and the categories of the understanding, I was thrown into Hegelianism. This, too, was at first entire darkness, but I was not disheartened. I attended Professor Weisse’s lectures on Hegel in the winter of 1841-2, and again in the winter of 1842-3 I attended his lectures on Logic and Metaphysics, and on the Philosophy of History. He took an interest in me, and I felt most strongly attracted by him. Soon after I joined his Philosophical Society, and likewise that of Professor Drobisch. In these societies every member, when his turn came, had to write an essay and defend it against the professor and the other members of the society. All this was very helpful, but it was not till I had heard a course of lectures on the History of Philosophy, by Professor Niedner, that my interest in Philosophy became strong and healthy. While Weisse was a leading Hegelian philosopher, and Drobisch represented the opposite philosophy of Herbart, Niedner was purely historical, and this appealed most to my taste. Still, my philosophical studies remained very disjointed. At last I was admitted to Lotze’s Philosophical Society also, and here we chiefly read and discussed Kant’s _Kritik_. Lotze was then quite a young man, undecided as yet himself between physical science and pure philosophy.