Plato on Philosophy

"Necessity is the mother of invention."

"Wise men speak because they have something to say; fools because they have to say something."

"It would be better for me … that multitudes of men should disagree with me rather than that I, being one, should be out of harmony with myself."

"No man of sense can put himself and his soul under the control of names... You must consider courageously and thoroughly and not accept anything carelessly."

"Perception and knowledge could never be the same."

"Stanford Encyclopedia of Philosophy:"

"The attempt to separate everything from everything else is not only not in good taste but also shows that a man is utterly uncultivated and unphilosophical. The complete separation of each thing from all is the utterly final obliteration of all discourse. For our power of discourse is derived from the interweaving of the classes or ideas with one another."

"Neither perception nor true opinion, nor reason or explanation combined with true opinion could be knowledge… Then our art of midwifery declare to us that all the offspring that have been born are mere wind-eggs and not worth rearing… and if you remain barren, you will be less harsh and gentler to your associates, for you will have the wisdom not to think you know that which you do not know."

"Law could never, by determining exactly what is noblest and must just for one and all, enjoin upon them that which is best; for the differences of men and of actions and the fact that nothing, I may say, in human life is ever at rest, forbid any science whatsoever to promulgate any simple rule for everything and for all time… So, that which is persistently simple is inapplicable to things which are never simple."

"Your pride has been too much for the pride of your admirers; they were numerous and high-spirited, but they have all run away, overpowered by your superior force of character; not one of them remains.  And I want you to understand the reason why you have been too much for them.  You think that you have no need of them or of any other man, for you have great possessions and lack nothing, beginning with the body, and ending with the soul."

"I shall have to test the theory of my father Parmenides, and contend forcibly that after a fashion not-being is and on the other hand in a sense being is not… For unless these statements are either disproved or accepted, no one who speaks about false words, or false opinion —whether images or likenesses or imitations or appearances— about the arts which have to do with them, can ever help being forced to contradict himself and make himself ridiculous."

"We certainly must contend by every argument against him who does away with knowledge or reason or mind and then makes any dogmatic assertion about anything. The philosopher, who pays the highest honor to these things, must necessarily, as it seems, because of them refuse to accept the theory of those who say the universe is at rest, whether as a unity or in many forms, and must also refuse utterly to listen to those who say that being is universal motion; … he must say that being and the universe consist of both."

"If the very essence of knowledge changes, at the moment of the change to another essence of knowledge there would be no knowledge, and if it is always changing, there will always be no knowledge, and by this reasoning there will be neither anyone to know nor anything to be known. But if there is always that which knows and that which is known —if the beautiful, the good, and all the other verities exist— I do not see how there is any likeness between these conditions of which I am now speaking and flux or motion."

"It is impossible that evils should be done away with, for there must always be something opposed to the good; and they… must inevitably hover about mortal nature and this earth. Therefore we ought to try to escape from earth to the dwelling of the gods as quickly as we can; and to escape is to become like God, so far as this is possible… God is in no wise and in no manner unrighteous, but utterly and perfectly righteous, and there is nothing so like him as that one of us who in turn becomes most nearly perfect in righteousness."

"Some say that the body is the "tomb" of the soul, their notion being that the soul is buried in the present life; and again, because by its means the soul gives any signs which it gives, it is for this reason also properly called "sign". But I think it most likely that the Orphic poets gave this name, with the idea that the soul is undergoing punishment for something; they think it has the body as an enclosure to keep it safe, like a prison, and this is, as the name itself denotes, the "safe" for the soul, until the penalty is paid, and not even a letter needs to be changed."

"The greatest and noblest conceptions have no image wrought plainly for human vision, which he who wishes to satisfy the mind of the inquirer can apply to some one of his senses and by mere exhibition satisfy the mind. We must therefore endeavor by practice to acquire the power of giving and understanding a rational definition of each one of them; for immaterial things, which are the noblest and greatest, can be exhibited by reason only, and it is for their sake that all we are saying is said. But it is always easier to practice in small matters than in greater ones."

"When earth meets with fire and is dissolved by the keenness of it, it would drift about, whether it were dissolved in fire itself, or in some mass of air or water, until the parts of it meeting and again being united became earth once more; for it never could pass into any other kind. But when water is divided by fire or by air, it may be formed again and become one particle of fire and two of air: and the divisions of air may become for every particle broken up two particles of fire. And again when fire is caught in air or in waters or in earth, a little in a great bulk, moving amid a rushing body, and contending with it is vanquished and broken up, two particles of fire combine into one figure of air: and when air is vanquished and broken small, from two whole and one half particle one whole figure of water will be composed. Let us also reckon it once again thus: when any of the other kinds is intercepted in fire and is divided by it through the sharpness of its angles and its sides, if it forms into the shape of fire, it at once ceases from being divided..."

"Doing what is for the good of the people, this must be the truest criterion of right government, in accordance with which the wise and good man will govern the affairs of his subjects. Just as the captain of a ship keeps watch for what is at any moment for the good of the vessel and the sailors, not by writing rules, but by making his science his law, and thus preserves his fellow voyagers, so may not a right government be established in the same way by men who could rule by this principle, making science more powerful than the laws? And whatever the wise rulers do, they can commit no error, so long as they maintain one great principle and by always dispensing absolute justice to them with wisdom and science are able to preserve the citizens and make them better than they were, so far as that is possible."

"Ηow natural it is that those who have spent a long time in the study of philosophy appear ridiculous when they enter the courts of law as speakers… Those who have knocked about in courts and the like from their youth up seem to me, when compared with those who have been brought up in philosophy and similar pursuits, to be as slaves in breeding compared with freemen… The latter always have leisure, and they talk at their leisure in peace;… and they do not care at all whether their talk is long or short, if only they attain the truth. But the men of the other sort are always in a hurry and the other party in the suit does not permit them to talk about anything they please."

"They do not know the penalty of unrighteousness, which is the thing they most ought to know. For it is not what they think it is—scourgings and death, which they sometimes escape entirely when they have done wrong—but a penalty which it is impossible to escape… Two patterns, my friend, are set up in the world, the divine, which is most blessed, and the godless, which is most wretched… and their silliness and extreme foolishness blind them to the fact that through their unrighteous acts they are made like the one and unlike the other. They therefore pay the penalty for this by living a life that conforms to the pattern they resemble."