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The first and the best victory is to conquer self.
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The physician, to the extent he is a physician, considers only the good of the patient in what he prescribes, and his own not at all.
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All things will be produced in superior quantity and quality, and with greater ease, when each man works at a single occupation, in accordance with his natural gifts, and at the right moment, without meddling with anything else.
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There still remain three studies suitable for free man. Arithmetic is one of them.
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Discordance is evil. Harmony is virtue.
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No one knows whether death may not be the greatest good that can happen to man.
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So the state founded on natural principles is wise as a whole in virtue of the knowledge inherent in its smallest constituent class, which exercises authority over the rest. And the smallest class is the one which naturally possesses that form of knowledge which alone of all others deserves the title of wisdom.
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Love: a grave mental disease.
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There are two things a person should never be angry at, what they can help, and what they cannot.
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Wealth does not bring excellence, but that wealth comes from excellence.
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The power to learn is present in everyone's soul, and the instrument with which each learns is like an eye that cannot be turned around from darkness to light without turning the whole body.
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Time is the moving imago of the unmoving eternity.
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I can show you that the art of calculation has to do with odd and even numbers in their numerical relations to themselves and to each other.
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Music is a moral law. It gives soul to the universe, wings to the mind, flight to the imagination, and charm and gaiety to life and to everything.
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Do not train children to learning by force and harshness, but direct them to it by what amuses their minds.
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The souls of people, on their way to Earth-life, pass through a room full of lights; each takes a taper - often only a spark - to guide it in the dim country of this world. But some souls, by rare fortune, are detained longer - have time to grasp a handful of tapers, which they weave into a torch. These are the torch-bearers of humanity - its poets, seers and saints, who lead and lift the race out of darkness, toward the light. They are the law-givers and saviors, the light-bringers, way-showers and truth-tellers, and without them, humanity would lose its way in the dark.
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Each citizen should play his part in the community according to his individual gifts.
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Mathematics is the language in which the gods talk to people.
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Those who have knowledge are more confident than those who have no knowledge, and they are more confident after they have learned than before.
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Don't force your children into your ways, for they were created for a time different from your own.
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If a man neglects education, he walks lame to the end of his life.
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Take charge of your thoughts. You can do what you will with them.
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No one knows whether death is really the greatest blessing a man can have, but they fear it is the greatest curse, as if they knew well.
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. . . Then anyone who leaves behind him a written manual, and likewise anyone who receives it, in the belief that such writing will be clear and certain, must be exceedingly simple-minded. . . .