All the interests of my reason, speculative as well as practical, combine in the three following questions: 1. What can I know? 2. What ought I to do? 3. What may I hope?
Metaphysics is a dark ocean without shores or lighthouse, strewn with many a philosophic wreck.
The sum total of all possible knowledge of God is not possible for a human being, not even through a true revelation. But it is one of the worthiest inquiries to see how far our reason can go in the knowledge of God.
I freely admit that the remembrance of David Hume was the very thing that many years ago first interrupted my dogmatic slumber and gave a completely different direction to my researches in the field of speculative philosophy.
The business of philosophy is not to give rules, but to analyze the private judgments of common reason.
When I could have used a wife, I could not support one; and when I could support one, I no longer needed any
It is precisely in knowing its limits that philosophy consists.
That Logic has advanced in this sure course, even from the earliest times, is apparent from the fact that, since Aristotle, it has been unable to advance a step, and thus to all appearance has reached its completion.
Philosophy stands in need of a science which shall determine the possibility, principles, and extent of human knowledge à priori.
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