Do you see a man wise in his own eyes? There is more hope for a fool than for him.” Proverbs 26:12
To be wise in your own eyes means to think you’re incapable of making mistakes, above reprehension, and know all the solutions to every problem – including yours and others.
Obviously, the mistake in this way of thinking is that none of these assumptions are correct. A person like this will simply appear proud, arrogant, unbearable, and… extremely dumb.
The alternative is to listen more, speak less, observe more, judge less, ask more, assume less, inform yourself more, isolate yourself less – recognise that you’re not the lord of everything and everyone.
True wisdom leads us to humility, not conceit.