Parmenides: I was pleased with you, Socrates, because you would not discuss the doubtful question in terms of visible objects or in relation to them, but only with reference to what we conceive most entirely by the intellect and may call ideas… But if you wish to get better training, you must do something more than that; you must consider not only what happens if a particular hypothesis is true, but also what happens if it is not true.

Parmenides: Whatever the subject of your hypothesis, if you suppose that it is or is not, or that it experiences any other affection, you must consider what happens to it and to any other particular things you may choose, and to a greater number and to all in the same way; and you must consider other things in relation to themselves and to anything else you may choose in any instance, whether you suppose that the subject of your hypothesis exists or does not exist, if you are to train yourself completely to see the truth perfectly.

Zeno: The many do not know that except by this devious passage through all things the mind cannot attain to the truth. Zeno: Most people are not aware that this roundabout progress through all things is the only way in which the mind can attain truth and wisdom.

Parmenides: If the one is not, nothing is. Then, and we may add, whether the one is or is not, the one and the others in relation to themselves and to each other all in every way are and are not and appear and do not appear.

Rhetoric, it seems, is a producer of persuasion for belief, not for instruction in the matter of right and wrong. And so the rhetorician's business is not to instruct a law court or a public meeting in matters of right and wrong, but only to make them believe.

Then the case is the same in all the other arts for the orator and his rhetoric; there is no need to know the truth of the actual matters, but one merely needs to have discovered some device of persuasion which will make one appear to those who do not know to know better than those who know.

The orators and the despots have the least power in their cities since they do nothing that they wish to do, practically speaking, though they do whatever they think to be best.

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.

Knowledge is the food of the soul; and we must take care, my friend, that the Sophist does not deceive us when he praises what he sells, like the dealers wholesale or retail who sell the food of the body; for they praise indiscriminately all their goods, without knowing what are really beneficial or hurtful.

There were many special laws affecting the several kings inscribed about the temples, but the most important was the following: They were not to take up arms against one another, and they were all to come to the rescue if any one in any of their cities attempted to overthrow the royal house; like their ancestors, they were to deliberate in common about war and other matters, giving the supremacy to the descendants of Atlas. And the king was not to have the power of life and death over any of his kinsmen unless he had the assent of the majority of the ten.