In the world we live in, one fool makes many fools, but one sage only a few sages.

The great trick of regarding small departures from the truth as the truth itself - on which is founded the entire integral calculus - is also the basis of our witty speculations, where the whole thing would often collapse if we considered the departures with philosophical rigour.

Good taste is either that which agrees with my taste or that which subjects itself to the rule of reason. From this we can see how useful it is to employ reason in seeking out the laws of taste.

He swallowed a lot of wisdom, but all of it seems to have gone down the wrong way.

Just as there are polysyllabic words that say very little, so there are also monosyllabic words of infinite meaning.

It not seldom happens that in the purposeless rovings and wanderings of the imagination we hunt down such game as can be put to use by our purposeful philosophy in its well-ordered household.

Never undertake anything unless you have the heart to ask Heaven's blessing on your undertaking.