If you're a Christian, here's the good news: who you really are has nothing to do with you—how much you can accomplish, who you can become, your behavior (good or bad) your strengths, your weaknesses, your sordid past, your family background, your education, your looks, and so on. Your identity is firmly anchored in Christ's accomplishment, not yours; his strength, not yours; his performance, not yours; his victory, not yours;. Your identity is steadfastly established in his substitution, not your sin. … The gospel doesn't just free you from what other people think about you; it frees you from what you think about yourself. You're free!
Tullian Tchividjian, Jesus + Nothing = Everything (pp. 130-131)