This is very helpful and encouraging for people like me who talk to themselves (don’t tell anyone).  I have to say aloud to myself things like “Don’t say that!” or “Don’t think that!” And I repeat gospel truths to myself regularly.  I remind myself that I’m forgiven, that I have access to God, and that God looks upon me favorably because of Jesus.  I remind myself of God’s approval and acceptance.  I do this because I am prone to forget.  We all are.  David was.