Then we may begin by assuming that there are three classes of men—lovers of wisdom, lovers of honor, lovers of gain? - Plato

There are three classes of men; lovers of wisdom, lovers of honor, and lovers of gain.

All is flux, nothing stays still

I shall try to persuade first the Rulers and soldiers, and then the rest of the community, that the upbringing and education we have given them was all something that happened to them only in a dream. In reality they were fashioned and reared, and their arms and equipment manufactured, in the depths of the earth, and Earth herself, their mother, brought them up, when they were complete, into the light of day; so now they must think of the land in which they live as their mother and protect her if she is attacked, while their fellow citizens they must regard as brothers born of the same mother earth…. That is the story. Do you know of any way of making them believe it?”
“Not in the first generation,” he said, “but you might succeed with the second, and later generations.

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 him.