Soc. Nonsense because I spoke of paining pleasure, and that is impossible?

Pro. Not only that, but because you do not understand that not one of us will let you go yet until you have finished the argument about these matters.

Soc. Whew, Protarchus! Then we have a long discussion before us, and not an easy one, either, this time. For in going ahead to fight mind’s battle for the second place, I think I need a new contrivance—other weapons, as it were, than those of our previous discussion, though perhaps some of the old ones will serve. Must I then go on?

Pro. Of course you must.

Soc. Then let us try to be careful in making our beginning.

Pro. What kind of a beginning do you mean?

Soc. Let us divide all things that now exist in the universe into two, or rather, if you please, three classes.

Pro. Please tell us on what principle you would divide them.

Soc. Let us take some of the subjects of our present discussion.

Pro. What subjects?

Soc. We said that God revealed in the universe two elements, the infinite and the finite, did we not?

Pro. Certainly.

Soc. Let us, then, assume these as two of our classes, and a third, made by combining these two. But I cut a ridiculous figure, it seems, when I attempt a division into classes and an enumeration.

Pro. What do you mean, my friend?

Soc. I think we need a fourth class besides.

Pro. Tell us what it is.

Soc. Note the cause of the combination of those two and assume that as the fourth in addition to the previous three.

Pro. And then will you not need a fifth, which has the power of separation?

Soc. Perhaps; but not at present, I think. However, if we do need a fifth, you will pardon me for going after it.

Pro. Of course.

Soc. First, then, let us take three of the four and, as we see that two of these are split up and scattered each one into many, let us try, by collecting each of them again into one, to learn how each of them was both one and many.

Pro. If you could tell me more clearly about them, I might be able to follow you.