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Selfishness is not living as one wishes to live, it is asking others to live as one wishes to live.

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Ability is of little account without opportunity.

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Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say that there is more stupidity than hydrogen, and that is the basic building block of the universe.

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Someday is not a day of the week.

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The world belongs to the enthusiast who keeps cool.

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One of rarest things that a man ever does is to do the best he can.

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People will listen a great deal more patiently while you explain your mistakes than when you explain your successes.

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That which we obtain too easily, we esteem too lightly.

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Success always occurs in private and failure in full public view.

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It would be naive to think that the problems plaguing mankind today can be solved with means and methods which were applied or seemed to work in the past. . .

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