Knowing is not enough; we must apply. Willing is not enough; we must do.

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  Nothing is more terrible than ignorance in action.

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  He who does not know foreign languages knows nothing of his own.

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  Ambition often puts men upon doing the meanest offices; so climbing is performed in the same posture with creeping.

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  Repetition is the mother of learning.

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  The first opinion which one forms of a prince, and of his understanding, is by observing the men he has around him.

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  The mind of a master does not stop on any one thing, even for an instant.

All aphorisms