"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 comparing various authors with one another, I have discovered that some of the gravest and latest writers have transcribed, word for word, from former works, without making acknowledgment."

"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."

"He is a hard man who is only just, and a sad one who is only wise."

"You can鈥檛 argue with all of the fools in the world. It鈥檚 easier to let them have their way, then trick them when they鈥檙e not paying attention."

"Whenever I hear anyone arguing for slavery, I feel a strong impulse to see it tried on him personally."

"To me YES, AND means don't be afraid to contribute. Always make sure you're adding something to the discussion. Your initiations are worthwhile."

"Too many people miss the silver lining because they're expecting gold."

"It is a common delusion that you can make things better by talking about them."