Let us come to the philosophers, whose authority is of greater weight, and their judgment more to be relied on, because they are believed to have paid attention, not to matters of fiction, but to the investigation of the truth.
I hold that the mark of a genuine idea is that its possibility can be proved, either a priori by conceiving its cause or reason, or a posteriori when experience teaches us that it is in fact in nature.
Metaphysics is the finding of bad reasons for what we believe upon instinct; but to find these reasons is no less an instinct.
It has been said that metaphysics is the finding of bad reasons for what we believe upon instinct.
Any necessary truth, whether a priori or a posteriori, could not have turned out otherwise.
Philosophy likes to keen common sense on the run.
Metaphysics means nothing but an unusually obstinate effort to think clearly.
I don't think there's an interesting boundary between philosophy and science. Science is totally beholden to philosophy. There are philosophical assumptions in science and there's no way to get around that.
