An artist never really finishes his work, he merely abandons it.

A great man is one who leaves others at a loss after he is gone.

Whoever wants to accomplish great things must devote to a lot of profound thought to details.

To be sincere means to be the same person when one is with oneself; that is to say, alone - but that is all it means.

A man who is 'of sound mind' is one who keeps the inner madman under lock and key.

History is the most dangerous product evolved from the chemistry of the intellect. ...History will justify anything. It teaches precisely nothing, for it contains everything and furnishes examples of everything.

History is the science of what never happens twice.