 When you walk in disobedience or you make a mistake, you're acting outside of who you really are. So when you sin and you feel like a fake, I have good news for you. You are a fake. You're a fake sinner. You're not a wolf in sheep's clothing. You're a sheep who put on wolves clothing. This isn't to say that you won't battle with the flesh. This is rather to say that the flesh isn't your true identity.