"This only is certain, that there is nothing certain; and nothing more miserable and yet more arrogant than man."

"No mortal man, moreover is wise at all moments."

"In these matters the only certainty is that nothing is certain."

"Why is it that we entertain the belief that for every purpose odd numbers are the most effectual?"

"The best plan is to profit by the folly of others."

"The only certainty is that nothing is certain."

"It does not matter much what a man hates provided he hates something."

"Envy is the consuming desire to have everybody else as unsuccessful as you are."

"Be neither too remote nor too familiar."

"Doroga k Zvjozdam Otkrita. (The way to the stars is open.)"

"Character is what you have left when you've lost everything you can lose."

"Nietzche started a nonsensical idea that men had once sought as good what we now call evil; if it were so, we could not talk of surpassing or even falling short of them."