Whoops. I meant to put this quote in my OP, as it's directly where I took the title from, and it basically summarizes everything else I've quoted from Schopenhauer:
"I therefore lay down the principle of the permanence of substance as a corollary of the law of causality. Moreover, we cannot possibly have arrived a posteriori at the conviction of the permanence of substance, because in most cases it is impossible to verify the facts empirically... that principle expresses trascendental knowledge, that is, a knowledge that determines and fixes prior to all experience everything possible in all experience. But in this very way, such knowledge reduces the world of experience generally to a mere phenomenon of the brain."
"I therefore lay down the principle of the permanence of substance as a corollary of the law of causality. Moreover, we cannot possibly have arrived a posteriori at the conviction of the permanence of substance, because in most cases it is impossible to verify the facts empirically... that principle expresses trascendental knowledge, that is, a knowledge that determines and fixes prior to all experience everything possible in all experience. But in this very way, such knowledge reduces the world of experience generally to a mere phenomenon of the brain."
He who loves God cannot endeavour that God should love him in return - Baruch Spinoza
