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The wise man knows of all things, as far as possible, although he has no knowledge of each of them in detail.
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Ancient laws remain in force long after the people have the power to change them.
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He who cannot see the truth for himself, nor, hearing it from others, store it away in his mind, that man is utterly worthless.
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And yet the true creator is necessity, which is the mother of invention.
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Whatsoever that be within us that feels, thinks, desires, and animates, is something celestial, divine, and, consequently, imperishable.
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Law is mind without reason.
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The soul never thinks without a picture.
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The intelligence consists not only in the knowledge but also in the skill to apply the knowledge into practice.
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For what is the best choice for each individual is the highest it is possible for him to achieve.
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Nothing in life is more necessary than friendship.
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You should never think without an image.
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The specific excellence of verbal expression in poetry is to be clear without being low.
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Happiness is a certain activity of soul in conformity with perfect goodness.
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The soul is the form of the body.
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Universal is known according to reason, but that which is particular, according to sense...
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Moral virtue is a mean . . . between two vices, one of excess and the other of defect; . . . it is such a mean because it aims at hitting the middle point in feelings and in actions. This is why it is a hard task to be good, for it is hard to find the middle point in anything.
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A state of the soul is either an emotion, a capacity, or a disposition; virtue therefore must be one of these three things.
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The virtue of a faculty is related to the special function which that faculty performs. Now there are three elements in the soul which control action and the attainment of truth: namely, Sensation, Intellect, and Desire. Of these, Sensation never originates action, as is shown by the fact that animals have sensation but are not capable of action.
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The first principle of all action is leisure.
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Therefore, even the lover of myth is a philosopher; for myth is composed of wonder.
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Between friends there is no need for justice, but people who are just still need the quality of friendship; and indeed friendliness is considered to be justice in the fullest sense.
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Humility is a flower which does not grow in everyone's garden.
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Love is composed of a single soul inhabiting two bodies.
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Art takes nature as its model.