He is unworthy of the name of man who is ignorant of the fact that the diagonal of a square is incommensurable with its side. Plato More Quotes by Plato More Quotes From Plato Adultery is the injury of nature. Plato adultery injury A fit of laughter, which has been indulged to excess, almost always produces a violent reaction. Plato excess laughter plato For every man who has learned to fight in arms will desire to learn the proper arrangement of an army, which is the sequel of the lesson. Plato army fighting men And when one of them meets the other half, the actual half of himself, whether he be a lover of youth or a lover of another sort, the pair are lost in an amazement of love and friendship and intimacy and one will not be out of the other's sight, as I may say, even for a moment. Plato soulmate love-and-friendship sight And what shall he suffer who slays him who of all men, as they say, is his own best friend? I mean the suicide, who deprives himself by violence of his appointed share of life. Not because the law of the state requires him. Nor yet under the compulsion of some painful and inevitable misfortune which has come upon him. Nor because he has had to suffer from irremediable and intolerable shame, but who from sloth or want of manliness imposes upon himself an unjust penalty. Plato suicidal suicide mean Man's music is seen as a means of restoring the soul, as well as confused and discordant bodily afflictions, to the harmonic proportions that it shares with the world soul of the cosmos. Plato confused inspiration mean The only thing worse than suffering an injustice is committing an injustice. Plato injustice suffering 'But the man who is ready to taste every form of knowledge, is glad to learn and never satisfied - he's the man who deserves to be called a philosopher, isn't he?' Plato words-of-wisdom taste men Pepper is small in quantity and great in virtue. Plato peppers cooking food But he who has been earnest in the love of knowledge and of true wisdom, and has exercised his intellect more than any other part of him, must have thoughts immortal and divine. If he attain truth, and in so far as human nature is capable of sharing in immortality, he must altogether be immortal. Plato human-nature science religion Geometry will draw the soul toward truth and create the spirit of philosophy. Plato soul math philosophy Music is a more potent instrument than any other for education. Plato art-education republic music Laws are partly formed for the sake of good men, in order to instruct them how they may live on friendly terms with one another, and partly for the sake of those who refuse to be instructed, whose spirit cannot be subdued, or softened, or hindered from plunging into evil. Plato law men order I exhort you also to take part in the great combat, which is the combat of life, and greater than every other earthly conflict. Plato combat conflict plato We are bound to our bodies like an oyster to its shell. Plato shells oysters body Whence comes war and fighting, and factions? Whence but from the body and the lust of the body? Wars are occasioned by the love of money, and money has to be acquired for the same and service of the body. Plato money love war Nothing is more unworthy of a wise man, or ought to trouble him more, than to have allowed more time for trifling, and useless things, than they deserve. Plato useless-things wise men The mortal nature is seeking as far as is possible to be everlasting and immortal: and this is only to be attained by generation, because the new is always left in the place of the old. Plato everlasting immortality generations Only a philosopher's mind grows wings, since its memory always keeps it as close as possible to those realities by being close to which the gods are divine. Plato wings memories reality Man is a prisoner who has no right to open the door of his prison and run away. . . . A man should wait, and not take his own life until God summons hiom. Plato running men life