"Man has been educated by woman. It is woman who has spoiled him."

"Of all that is written I love only what a man has written in his own blood."

"There are no facts, only interpretations."

"The weak and the ill-constituted shall perish: first principle of our philanthropy. And one shall help them to do so."

"The surest means of corrupting a youth is to instruct him to hold in higher esteem those who think alike than those who think differently."