“...if we gained only one incontestable truth every ten years from each of our philosophical writers the harvest we reaped would be sufficient.”

“God creates the animals man creates himself.”

“It is too bad if you have to do everything upon reflection and can't do anything from early habit.”

“Never undertake anything for which you wouldn't have the courage to ask the blessings of heaven.”

“Too much is unwholesome.”

“Just as we outgrow a pair of trousers we outgrow acquaintances libraries principles etc. at times before they're worn out and times-and this is the worst of all-before we have new ones.”

“The fly that doesn't want to be swatted is most secure when it lights on the fly-swatter.”

“It often takes more courage to change one's opinion than to stick to it.”

“One's first step in wisdom is to question everything one's last is to come to terms with everything.”

“Prejudices are so to speak the mechanical instincts of men: through their prejudices they do without any effort many things they would find too difficult to think through to the point of resolving to do them.”

“Don't judge a man by his opinions, but what his opinions have made of him.”