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The highest activity a human being can attain is learning for understanding, because to understand is to be free.

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He alone is free who lives with free consent under the entire guidance of reason

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whatsoever is, is in God, and without God nothing can be, or be conceived

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I do not know how to teach philosophy without becoming a disturber of the peace.

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I have made a ceaseless effort not to ridicule, not to bewail, not to scorn human actions, but to understand them.

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Freedom is absolutely necessary for the progress in science and the liberal arts.

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In proportion as we endeavor to live according to the guidance of reason, shall we strive as much as possible to depend less on hope, to liberate ours...more

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He alone is free who lives with free consent under the entire guidance of reason.

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Things which are accidentally the causes either of hope or fear are called good or evil omens.

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The more you struggle to live, the less you live. Give up the notion that you must be sure of what you are doing. Instead, surrender to what is real w...more

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I do not know how to teach philosophy without becoming a disturber of established religion.

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All laws which can be violated without doing any one any injury are laughed at. Nay, so far are they from doing anything to control the desires and pa...more

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aquele que quer responder às injúrias com o ódio vive na tristeza ou na mágoa, aquele que quer vencer o ódio com o amor combate alegremente e sem temo...more

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I should attempt to treat human vice and folly geometrically... the passions of hatred, anger, envy, and so on, considered in themselves, follow from ...more

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Falsity consists in the privation of knowledge, which inadequate, fragmentary, or confused ideas involve.