The Republic by Plato Part 4 Page 88

escape from injustice and vice; assuming them both to be such as we have described?

Yes, I said, the question is, as you say, ridiculous. Still, as we are near the spot at which we may see the truth in the clearest manner with our own eyes, let us not faint by the way.

Certainly not, he replied.

Come up hither, I said, and behold the various forms of vice, those of them, I mean, which are worth looking at.

I am following you, he replied: proceed.

I said, The argument seems to have reached a height from which, as from some tower of speculation, a man may look down and see that virtue is one, but that the forms of vice are innumerable; there being four special ones which are deserving of note.