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Never put off until tomorrow what you can do the day after tomorrow.

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The more original a discovery, the more obvious it seems afterwards.

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Sometimes the heart sees what is invisible to the eye.

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Immature love says, "I love you because I need you." Mature love says, "I need you because I love you."

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The only man who never makes a mistake is the man who never does anything.

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Education is not the filling of a pail, but the lighting of a fire.

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An idea is salvation by imagination.

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Explanation separates us from astonishment, which is the only gateway to the incomprehensible.

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To know when to be generous and when to be firm -- this is wisdom.

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There are no facts, only interpretations.

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