“There is no moral precept that does not have something inconvenient about it.” — Denis Diderot

“A man who has to be punctually at a certain place at five o’clock has the whole afternoon ruined for him already.” — Lin Yutang

“To be idle requires a strong sense of personal identity.” — Robert Louis Stevenson

“No man was ever wise by chance.” — Seneca

“There is a tragic flaw in our precious Constitution, and I don’t know what can be done to fix it. This is it: Only nut cases want to be president.” — Kurt Vonnegut

“It is not because things are difficult that we do not dare. It is because we do not dare that they are difficult.” — Seneca

“It is amazing how complete is the delusion that beauty is goodness.” — Tolstoy

“Some actions are called malicious because they’re done by ugly people.” — Georg Christoph Lichtenberg

A new student once asked Euclid, “But what shall I get by learning these things?”

The geometer called his slave and said, “Give him three obols, since he must make gain out of what he learns.”

“Round numbers are always false.” — Samuel Johnson