See a man wise in his own eyes? there is more hope of a fool than of him.
All Commentaries on Proverbs 26:12 Go To Proverbs 26
Gregory the Theologian
AD 390
There is an evil which I have seen under the sun, a person wise in his own conceit; and a still greater evil is to charge with the instruction of others a person who is not even aware of his own ignorance. In Defense of His Flight, Oration