What we would prefer God not to see
Psalm 139 reminds us that God has seen us from before we were born - in our mother's womb - to the present day. He knows everything about us, and see all our actions and thoughts. What things would we prefer God not to know about us?
Don't go overboard about this question, but are there one or two things that you would prefer to change? Can you truly repent, and ask God's help to try to amend your ways?