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

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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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We can't solve today's problems with the mentality that created them.

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Be a voice not an echo.

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Don't wait for miracles, your whole life is a miracle.

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Experience is knowledge. All the rest is information.

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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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The stupid are invincible.

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A problem defined, is a problem half solved.

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When I have one week to solve a seemingly impossible problem, I spend six days defining the problem. Then, the solution becomes obvious.

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