. . . if you can tell the difference between good advice and bad advice, you don't need advice.
Nobody can be perfect unless he admits his faults, but if he has faults how can he be perfect?
A man doesn't know what he knows until he knows what he doesn't know.
A rut is a grave with the ends knocked out.
They lead only as the carved wooden figurehead leads the ship.
The modern child will answer you back before you've said anything.