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Behold a universe so immense that I am lost in it. I no longer know where I am. I am just nothing at all. Our world is terrifying in its insignificance.
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A work of morality, politics, criticism will be more elegant, other things being equal, if it is shaped by the hand of geometry.
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A man finds no sweeter voice in all the world than that which chants his praise.
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I detest war; it ruins conversation.
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Since the princes take the Earth for their own, it's fair that the philosophers reserve the sky for themselves and rule there, but they should never permit the entry of others.
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I feel nothing, apart from a certain difficulty in continuing to exist.
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Hardly anyone knows how much is gained by ignoring the future.
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I have lived one hundred years; and I die with the consolation of never having thrown the slightest ridicule upon the smallest virtue.
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In vain we shall penetrate more and more deeply the secrets of the structure of the human body, we shall not dupe nature; we shall die as usual.
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Neatness is a crowning grace of womanhood.
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Our sun enlightens the planets that belong to him; why may not every fixed star also have planets to which they give light?
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The judgment may be compared to a clock or watch, where the most ordinary machine is sufficient to tell the hours; but the most elaborate alone can point out the minutes and seconds, and distinguish the smallest differences of time.
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Women react differently: a French woman who sees herself betrayed by her husband will kill his mistress; an Italian will kill her husband; a Spaniard will kill both; and a German will kill herself.
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Nature is never so admired as when she is understood.
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An educated mind is, as it were, composed of all the minds of preceding ages.
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It is the passions that do and undo everything.
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If I held all the thoughts of the world in my hand, I would be careful not to open it.
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Nothing can be more destructive to ambition, and the passion for conquest, than the true system of astronomy. What a poor thing is even the whole globe in comparison of the infinite extent of nature!
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Nature intends that, at fixed periods, men should succeed each other by the instrumentality of death. We shall never outwit Nature; we shall die as usual.
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There is nothing one sees oftener than the ridiculous and magnificent, such close neighbors that they touch.
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To despise theory is to have the excessively vain pretension to do without knowing what one does, and to speak without knowing what one says.
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Leibniz never married; he had considered it at the age of fifty; but the person he had in mind asked for time to reflect. This gave Leibniz time to reflect, too, and so he never married.
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A well-cultivated mind is, so to speak, made up of all the minds of preceding ages; it is only one single mind which has been educated during all this time.
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Ah! si l'on o" tait les chime' res aux hommes, quel plaisir leur resterait? Oh! If man were robbed of his fantasies, what pleasure would be left him?