Because of the gospel I can (must?) "be real."
Better said by J. D. Greear:
“When you are satisfied with God’s presence and approval in your life, you will no longer obsess about what everyone else thinks about you. You can quit hiding your faults and start living with authenticity, letting people see the real you — the ‘you’ with all the faults and warts — because you no longer depend on their admiration for personal fulfillment.
It is a revolutionary, liberating truth: in Christ, you have all you need for everlasting joy. His approval and presence are all that you need for life and happiness.
He is the only One who should play the role of God in our lives. He has no equals, no partners, and doesn’t want to share the office of ‘God’ with anyone.”— J. D. Greear