A friend once wrote the following on her blog:
"I need to be willing to protect myself from my past to prevent its influence on my future."
That is one of the most profound comments I have read on any blog. It captures perfectly my view of the heart of repentance - and it is SO difficult without constant attention, which, in turn, makes it difficult to keep it at bay and in the past. Talk about a paradox.
In order to leave the past behind and pursue perfection, we need to actively consider, construct and pursue a new present - one that will build a more sure future. It's not just about avoiding degrading things, as important as that is; it's about developing a Christ-like heart and life.