Talent hits a target no one else can hit; genius hits a target no one else can see.

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  Every man takes the limits of his own field of vision for the limits of the world.

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  To estimate how happy a man is, one should ask not what pleases him, but what troubles him.

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  Solitude is the lot of all outstanding minds.

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  What a man is in himself, what accompanies him when he is alone, what no one can give or take away, is more essential to him than everything he has or what he may be in the eyes of others.

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  Bad books are intellectual poison; they destroy the mind.

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  The safest way of not being very miserable is not to expect to be very happy.

All aphorisms