The Republic of Plato

Then, I said, Thrasymachus, there is no one in any rule who, in so far as he is a ruler, considers or enjoins what is for his own interest, but always what is for the interest of his subject or suitable to his art; to that he looks, and that alone he considers in everything which he says and does.

Yes, I said, my impression was that you did so, when you admitted that the ruler was not infallible but might be sometimes mistaken.who adopts another line of defence: ‘No artist or ruler is ever mistaken qua artist or ruler.’

words of Hesiod;— 44

‘Vice may be had in abundance without trouble; Dthe way is smooth and her dwelling-place is near. But before virtue the gods have set toil6