The litmus test of whether or not you understand the gospel is what you do when you fail. Do you run from God and go try to clean yourself up a bit before you come back into the throne room, or do you approach the throne of grace with confidence? If you don't approach the throne of grace with confidence, you don't understand the gospel. You are most offensive to God when you come to him with all of your efforts, when you're still trying to earn what's freely given.