The Gospel of Jesus Christ is centered around His Atonement. It is also the ONLY way we can access the FULL power of the Atonement, and understand His redeeming grace. These are the steps, in order, with the past post associated with it.
This talk given at BYU explains why we follow this Doctrine. More importantly, Brad Wilcox explains HOW Christ's Grace works. My invitation to you echos Mr. Wilcox's. So, you should watch it, and remember the Grace of Jesus Christ.