Show me a satisfied man, and I'll show you a failure.

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Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.

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I believe we are here to do good. It is the responsibility of every human being to aspire to do something worthwhile, to make the world a better place than the one we found.

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The only thing more dangerous than ignorance is arrogance

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Men marry women with the hope they will never change. Women marry men with the hope they will change. Invariably they are both disappointed.

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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

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God did not create evil. Just as darkness is the absence of light, evil is the absence of God.

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Insanity: doing the same thing over and over again and expecting different results.

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We cannot get to where we dream of being tomorrow unless we change our thinking today.

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Failure is only postponed success as long as courage 'coaches' ambition.

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