Any more than heat can produce cold?

It cannot.

Or drought moisture? 12

SOCRATES, POLEMARCHUS, THRASYMACHUS. Clearly not.

Nor can the good harm any one?

Impossible.

And the just is the good?

Certainly.

Then to injure a friend or any one else is not the act of a just man, but of the opposite, who is the unjust?

I think that what you say is quite true, Socrates.