Socrates : ... but as concerning justice, what is it? -- to speak the truth and to pay your debts -- no more than this? And even to this are there not exceptions? Suppose that a friend when in his right mind has deposited arms with me and he asks for them when he is not in his right mind, ought I to give them back to him? No one would say that I ought or that I should be right in doing so, any more than they would say that I ought always to speak the truth to one who is in his condition.

You are quite right, he replied.

But then, I said, speaking the truth and paying your debts is not a correct definition of justice.