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All teaching and all intellectual learning come about from already existing knowledge.
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...perhaps there is some element of good even in the simple act of living, so long as the evils of existence do not preponderate too heavily.
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Rising before daylight is also to be commended; it is a healthy habit, and gives more time for the management of the household as well as for liberal studies.
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If 'bounded by a surface' is the definition of body there cannot be an infinite body either intelligible or sensible.
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There is a cropping-time in the races of men, as in the fruits of the field; and sometimes, if the stock be good, there springs up for a time a succession of splendid men; and then comes a period of barrenness.
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Our account does not rob the mathematicians of their science... In point of fact they do not need the infinite and do not use it.
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A period may be defined as a portion of speech that has in itself a beginning and an end, being at the same time not too big to be taken in at a glance.
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The avarice of mankind is insatiable; at one time two obols was pay enough; but now, when this sum has become customary, men always want more and more without end.
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The soul suffers when the body is diseased or traumatized, while the body suffers when the soul is ailing.
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Metaphysics is universal and is exclusively concerned with primary substance. ... And here we will have the science to study that which is, both in its essence and in the properties which it has.
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We are masters of our actions from the beginning up to the very end. But, in the case of our habits, we are only masters of their commencement - each particular little increase being as imperceptible as in the case of bodily infirmities. But yet our habits are voluntary, in that it was once in our power to adopt or not to adopt such or such a course of conduct.
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We have divided the Virtues of the Soul into two groups, the Virtues of the Character and the Virtues of the Intellect.
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Of ill-temper there are three kinds: irascibility, bitterness, sullenness. It belongs to the ill-tempered man to be unable to bear either small slights or defeats but to be given to retaliation and revenge, and easily moved to anger by any chance deed or word. Ill-temper is accompanied by excitability of character, instability, bitter speech, and liability to take offence at trifles and to feel these feelings quickly and on slight occasions.
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While the faculty of sensation is dependent upon the body, mind is separable from it.
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The soul is the cause or source of the living body. The terms cause and source have many senses. But the soul is the cause of its body alike in all three senses which we explicitly recognize. It is (a) the source or origin of movement, it is (b) the end, it is (c) the essence of the whole living body.
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Concerning the generation of animals akin to them, as hornets and wasps, the facts in all cases are similar to a certain extent, but are devoid of the extraordinary features which characterize bees; this we should expect, for they have nothing divine about them as the bees have.
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If a man of good natural disposition acquires Intelligence, then he excels in conduct, and the disposition which previously only resembled Virtue, will now be Virtue in the true sense. Hence just as with the faculty of forming opinions there are two qualities, Cleverness and Prudence, so also in the moral part of the soul there are two qualities, natural virtue and true Virtue; and true Virtue cannot exist without Prudence.
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It has been handed down in mythical form from earliest times to posterity, that there are gods, and that the divine (Deity) compasses all nature. All beside this has been added, after the mythical style, for the purpose of persuading the multitude, and for the interests of the laws, and the advantage of the state.
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To learn is a natural pleasure, not confined to philosophers, but common to all men.
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Jealousy is both reasonable and belongs to reasonable men, while envy is base and belongs to the base, for the one makes himself get good things by jealousy, while the other does not allow his neighbour to have them through envy.
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The light of the day is followed by night, as a shadow follows a body.
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If the hammer and the shuttle could move themselves, slavery would be unnecessary.
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A good style must have an air of novelty, at the same time concealing its art.
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No democracy can exist unless each of its citizens is as capable of outrage at injustice to another as he is of outrage at unjustice to himself.