Oprah's Lifeclass audience member Michelle says that, three years ago, she could tell you who she was: She was a wife, a mother and a woman who weighed 400 pounds. Now, she's none of those things. Watch as Michelle shares her feelings of shame and low self-worth with Oprah and Pastor Joel Osteen. Can she turn her negative "I am" statements into positive ones? Pastor Osteen helps Michelle rediscover her purpose.