Those who really deal with their sins are those who finally come to the conclusion that they are not able to handle their sin without divine help. There is nothing we can do to undo what we have done. There is nothing we can do to alter the negative cause-effect relationship set in motion once we choose to commit sin. There is nothing we can do to take away the guilt that keeps us always looking over our shoulder for someone to slip up on us with an axe. The first step toward dealing with our sin is acknowledging that we are undone and without hope. (Ephesians 2:12)
Fortunately, there is a way of getting out from under this sin predicament we have created for ourselves, but it is not found in ourselves but in the Christ who has sacrificed Himself. We are made whole "...through the offering of the body of Jesus Christ once for all." (Hebrews 10:10) In another place the Words says, "..He has appeared once for all to at the end of the age to remove sin by the sacrifice of Himself. (Hebrews 9:26) This may not be good news for those who figure ingenuity and determination will deliver them, but it is truly good news to those who know they need a Savior.