God is less concerned about what you have done in the past than what He plans to do through you in the future.
Take a moment and thank Christ for the gift of grace which frees you from your past. With the burden of past sins removed, go forth with renewed vigor to serve God.
For if you possess these qualities in increasing measure, they will keep you from being ineffective and unproductive in your knowledge of our Lord Jesus Christ. But if anyone does not have them, he is nearsighted and blind, and has forgotten that he has been cleansed from his past sins.