Love shows itself more in adversity than in prosperity; as light does, which shines most where the place is darkest.

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I am not poor. Poor are those who desire many things.

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Learning is the only thing that never disappoints us.

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I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do.

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Learning is the only thing the mind never exhausts, never fears, and never regrets.

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Study without desire spoils the memory, and it retains nothing that it takes in.

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It's not enough that you believe what you see. You must also understand what you see.

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life without love, is no life at all

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Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity.

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Simplicity is the ultimate sophistication.

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