I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.

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Life is like riding a bicycle. To keep your balance, you must keep moving.

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Our lives will be measured by what we do for others

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Those who manage their way into a crisis are not necessarily the right people to manage their way out of a crisis

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Knowledge and ego are directly related. the less knowledge, the greater the ego

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The only thing more dangerous than ignorance is arrogance

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Genius is making complex ideas simple, not making simple ideas complex

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Great spirits have always encountered opposition from mediocre minds. The mediocre mind is incapable of understanding the man who refuses to bow blindly to conventional prejudices and chooses instead to express his opinions courageously and honestly.

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Cherish the questions, for the answers keep changing.

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Just because you believe in something does not mean that it is true.

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