Proverbs 20: 27
The spirit of a man is the lamp of the Lord, searching all the innermost parts of his being.
So the Lord uses a man's spirit in him to shine into all his innermost parts, revealing what is hidden there.
So David could say,
Psalm 139: 1
You have searched me and known me.
And he could also ask,
Psalm 139: 23-24
Search me, O God, and know my heart; Try me and know my anxious thoughts; And see if there be any hurtful way in me, and lead me in the everlasting way.
David knew that God knew him intimately, so he asked Him to reveal whatever was in David's being that was hidden away from himself (in denial) so he could deal with it and do right (the "everlasting way").
O my Father, I also pray with David; please search me, too, and show me whatever is in my being that is not in accordance with Your thinking processes and attitudes and character. Help me to face these things and deal with them by replacing them with Your ways, Father, Your everlasting way.
Even so, come, Lord Jesus!
