Who said “Of all that is written, I love only what a man has written with his own blood.”?

“Writers are always selling somebody out.”

“It's very hard to be a gentleman and a writer.”

“I'd rather be a lightning rod than a seismograph.”

“Writing is turning one's worst moments into money.”

“A professional writer is an amateur who didn't quit.”

“Morality is herd instinct in the individual.”

“There is more wisdom in your body than in your deepest philosophy.”

“What is good? All that heightens the feeling of power, the will to power, power itself in man.”

“Madness is something rare in individuals — but in groups, parties, peoples, epochs it is the rule.”

“The true man wants two things: danger and play. For that reason he wants woman, as the most dangerous toy.”

“The surest way to corrupt a youth is to instruct him to hold in higher esteem those who think alike than those who think differently.”