The Republic by Plato Part 6 Page 72

principle such and so great as this ought the best men in our State, to whom everything is entrusted, to be in the darkness of ignorance?

Certainly not, he said.

I am sure, I said, that he who does not know how the beautiful and the just are likewise good will be but a sorry guardian of them; and I suspect that no one who is ignorant of the good will have a true knowledge of them.

That, he said, is a shrewd suspicion of yours.

And if we only have a guardian who has this knowledge our State will be perfectly ordered?

Of course, he replied; but I wish that you would tell me whether you conceive this supreme principle of the good to be knowledge or pleasure, or different from either?