Psalm 19
Creation speaks without words, and the sun runs like a joyful bridegroom. Then the psalm turns to God's law, which revives the soul and gladdens the heart and is sweeter than honey. It ends humbly: I can't even see all my own errors, so cleanse me from hidden faults. Honesty about ourselves includes admitting there's more than we know.
"Who can discern his own errors? Cleanse me from my hidden faults." (Psalm 19:12)