Repentance or retirement?

I ran across this idea from Jay Nordlinger, who writes "Impromptus" for National Review Online. Writing about Newt Gingrich, who apparently asked his 2nd wife for an "open marriage" so he could pursue his relationship with his current wife Callista with less guilt, Nordlinger wondered whether Newt had truly repented  of his past evil ways (as he has claimed), or simply retired, having decided that he's too old to chase another skirt. Who knows which is true in that case? I surely don't.

But I bring it up because I think that the same dynamic is at work in a lot of us Christians. We don't really mature so much as simply get too old and tired to sin in the same ways. We aren't less angry, we just don't have the energy to spend expressing it like we used to. We aren't less lustful, we just had our testosterone levels drop. We aren't less greedy, it's just that we already have most of what we want, and don't see a good opportunity to be truly rich and get the rest of it.

Oh gracious Lord, preserve me from confusing repentance with retirement, turning from sin with contentment at our current level of it. Help us to truly change our hearts. Amen.