What I learned at this Sundays service

That its alright to look back at the past, as long as you don't linger there. See what you used to be and do, then turn around and see where you are now and take a good look at what you're doing with your life now.
For the word says Hebrews 10:16-17 This is the covenant that I will make with them after those days, saith the Lord I will put my laws into their hearts, and in their minds will I write them; And their sins and iniquities will I remember no more.
So, if the Lord can forgive and forget what we did before we turned over our lives (heart, mind, body, soul) to him. Surely we can rejoice in the fact that we no longer are what we once were.