Paul says in Romans 12: 16, “Do not be of a haughty mind” and “Do not be wise in your own estimation.”
Proverbs 3: 7 says, “Be not wise in your own eyes; fear the LORD, and turn away from evil.”
Isaiah 5:21 says, “Woe to those who are wise in their own eyes, and shrewd in their own sight!”
As I have grown older, I have learned that there is a kind of ignorance which is a matter of true wisdom. To be sure, I am not speaking of ignorance by mere neglect or by lack of opportunity. I am speaking of a kind of ignorance which should be studied and cultivated with humility before God and man. Charles Haddon Spurgeon said, “Beware of no man more than of yourself; we carry our worst enemies within us.” Therefore, we must study our own lives and repent of being smart in our sin. The mere thought should drive us to our knees. Scripture plainly teaches that we are to be wise as serpents–to detect and avoid the designs of the enemy, and to be harmless as doves–to be an apt picture of love or to put it more plainly–to be good wise and evil simple.