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All knowledge is but remembrance.
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Mathematics is the language in which the gods talk to people.
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Poets do not compose their poems with knowledge, but by some inborn talent and by inspiration, like seers and prophets who also say many fine things without any understanding of what they say.
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Music is moral law. It is the essence of order and leads to all that is good, true and beautiful.
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There still remain three studies suitable for free man. Arithmetic is one of them.
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All learning is in the learner, not the teacher.
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There are three classes of men; lovers of wisdom, lovers of honor, and lovers of gain.
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One trait in the philosopher's character we can assume is his love of the knowledge that reveals eternal reality, the realm unaffected by change and decay.
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The point which I should first wish to understand is whether the pious or holy is beloved by the gods because it is holy, or holy because it is beloved of the gods.
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Education in music is most sovereign because more than anything else rhythm and harmony find their way to the innermost soul and take strongest hold upon it.
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You want to know whether I can make a long speech, such as you are in the habit of hearing; but that is not my way.
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It is through geometry that one purifies the eye of the soul.
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Life should be lived as play.
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Tyranny naturally arises out of democracy.
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Too much attention to health is a hindrance to learning, to invention, and to studies of any kind, for we are always feeling suspicious shootings and swimmings in our heads, and we are prone to blame studies from them.
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No man should be angry with what is true.
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Wisdom always makes men fortunate: for by wisdom no man could ever err, and therefore he must act rightly and succeed, or his wisdom would be wisdom no longer.
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Was not this ... what we spoke of as the great advantage of wisdom -- to know what is known and what is unknown to us?
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Either we shall find what it is we are seeking or at least we shall free ourselves from the persuasion that we know what we do not know.
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I have hardly ever known a mathematician who was capable of reasoning.
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Education and admonition commence in the first years of childhood, and last to the very end of life.
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What is at issue is the conversion of the mind from the twilight of error to the truth, that climb up into the real world which we shall call true philosophy.
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When there is crime in society, there is no justice.
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The fear of death is indeed the pretence of wisdom, and not real wisdom, being the appearance of knowing the unknown.