The best man of all is he who knows everything himself. Good also the man who accepts another's sound advice; but the man who neither knows himself nor takes to hear what another says, he is no good at all.
HesiodBadness you can get easily, in quantity. The road is smooth and lies close by. But in front of excellence the immortal gods have put sweat, and long and steep is the way to do it, and rough at first. But when you come to the top, then it is easy, even though it is hard.
HesiodEvil can be got very easily and exists in quantity: the road to her is very smooth, and she lives near by. But between us and virtue the gods have placed the sweat of our brows; the road to her is long and steep, and it is rough at first; but when a man has reached the top, then she is easy to attain, although before she was hard.
Hesiod