He who thinks and thinks for himself, will always have a claim to thanks; it is no matter whether it be right or wrong, so as it be explicit. If it is right, it will serve as a guide to direct; if wrong, as a beacon to warn.

It is the greatest good to the greatest number of people which is the measure of right and wrong.

The efficient man is the man who thinks for himself.

He reproduced himself with so much humble objectivity, with the unquestioning, matter of fact interest of a dog who sees himself in a mirror and thinks: there's another dog.

The principle of asceticism never was, nor ever can be, consistently pursued by any living creature. Let but one tenth part of the inhabitants of the earth pursue it consistently, and in a day's time they will have turned it into a Hell.

He who falls in love with himself will have no rivals.