"If you have more than one reason to do something (choose a doctor or veterinarian, hire a gardener or an employee, marry a person, go on a trip), just don't do it. Obvious decisions (robust to error) …"

"I suspect that the readiest way to determine a person's intelligence is to look at the number of his enemies."

"The more complex the system, the more likely it is to fail."

"Never ask a man if he is from Lacedaemonia. If he is, he will tell you. If he is not, why embarrass him?"

"The only way to learn is by doing."