In Göttingen, he advised his student Arthur Schopenhauer to concentrate on the philosophies of Plato and Kant. This advice had a strong influence on Schopenhauer's philosophy. In the winter semester of 1810 and 1811, Schopenhauer studied both psychology and metaphysics under Schulze.[2]
"As determined by the Critique of Pure Reason, the function of the principle of causality thus undercuts all philosophizing about the where or how of the origin of our cognitions. All assertions on the matter, and every conclusion drawn from them, become empty subtleties, for once we accept that determination of the principle as our rule of thought, we could never ask, "Does anything actually exist which is the ground and cause of our representations?". We can only ask, "How must the understanding join these representations together, in keeping with the pre-determined functions of its activity, in order to gather them as one experience?"[3]
References
^Encyclopedia of Philosophy, Vol. 7, New York: Macmillan, 1972.
^Di Giovanni, George, and H. S. Harris (eds.), Between Kant and Hegel, Indianapolis: Hackett, 2000, p. 131, ISBN0-87220-504-5 (original quote from: Gottlob Ernst Schulze, Aenesidemus, 1792, pp. 176–7).