如果你要创新，你必须愿意被误解。

Changing the destructive things you say to yourself when you experience the setbacks that life deals all of us is the central skill of optimism.

"Life is what happens when you're busy making other plans."

A society that puts equality before freedom will get neither. A society that puts freedom before equality will get a high degree of both.

重要的不是身体的力量，而是精神的力量。