"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."

"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."

"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."

"Wonder is the feeling of a philosopher, and philosophy begins in wonder."

"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."

"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."

"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."

"Perception and knowledge could never be the same."

"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."

"I do see one large and grievous kind of ignorance, separate from the rest, and as weighty as all the other parts put together. Thinking that one knows a thing when one does not know it. Through this, I believe, all the mistakes of the mind are caused in all of us."

"Those who purge the soul believe that the soul can receive no benefit from any teachings offered to it until someone by cross-questioning reduces him who is cross-questioned to an attitude of modesty, by removing the opinions that obstruct the teachings, and thus purges him and makes him think that he knows only what he knows, and no more."

"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."

"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."

"No one should be discouraged, Theaetetus, who can make constant progress, even though it be slow."