“He was weak on philosophy and an excellent driver, but his driving was a lot more dangerous than his philosophy.”

“An excellent plumber is infinitely more admirable than an incompetent philosopher. The society which scorns excellence in plumbing because plumbing is a humble activity, and tolerates shoddiness in philosophy because it is an exalted activity, will have neither good plumbing nor good philosophy. Neither its pipes nor its theories will hold water.”

“[...] for the philosophy of Square rendered him superior to all emotions, and he very calmly smoaked his pipe, as was his custom in all broils, unless when he apprehended some danger of having it broke in his mouth.”

“Apparently, philosophy persists, even though less obviously and less insistently than once. If John has trimmed his interests to conform to the expectations of the adult world, that's a shame. But if he has simply moved on to other interests, that's natural enough. There's more to life than philosophy.”

“The modern habit of saying "This is my opinion, but I may be wrong" is entirely irrational. If I say that it may be wrong, I say that is not my opinion. The modern habit of saying "Every man has a different philosophy; this is my philosophy and it suits me" – the habit of saying this is mere weak-mindedness. A cosmic philosophy is not constructed to fit a man; a cosmic philosophy is constructed to fit a cosmos. A man can no more possess a private religion than he can possess a private sun and moon.”

“Every philosophy is a foreground philosophy — that is a hermit's judgment: "There is something arbitrary in his stopping here to look back and look around, in his not digging deeper here but laying his spade aside; there is also something suspicious about it." Every philosophy also conceals a philosophy; every opinion is also a hideout, every word also a mask.”