Reinhold Niebuhr gives us this reality needing to be addressed:

No amount of evidence to the contrary seems to shake man’s grand opinion of himself.

Proverbs 20:6 addresses it further:

Every man proclaims his own goodness.

Isaiah 66:2 resolves this for us:

This is the one to whom I will look; he who is humble and contrite in spirit, and trembles at My word.