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

There are very many people who read simply to prevent themselves from thinking.

The thoughts written on the walls of madhouses by their inmates might be worth publicizing.

Delight at having understood a very abstract and obscure system leads most people to believe in the truth of what it demonstrates.

It is almost everywhere the case that soon after it is begotten the greater part of human wisdom is laid to rest in repositories.

He who says he hates every kind of flattery, and says it in earnest, certainly does not yet know every kind of flattery.

Man is a masterpiece of creation if for no other reason than that, all the weight of evidence for determinism notwithstanding, he believes he has free will.