Windows Vista is the Operating System of my Better Nature.

So here's a thought that hit me a few days back --

I think we've all heard the idea of appealing to someone's better nature, in order to accomplish something good. And there's a certain branch of Christianity that holds the idea that humanity essentially has no better nature, and anything good one does comes from God, and anything bad comes from the individual person. The only thing you're responsible for is the bad things. You have no control, no input, and nothing to do with the good things (which, in a way, almost makes the good things impersonal, because if it all comes from God, couldn't the good things come from anyone? Whereas the bad things are a result of the person's personality. Some people might steal, whereas other might murder).

Anyway, for people who believe that ... do they have a better nature to appeal to? After all, their better nature is a result of God, and not having any connection to their personality. So in appealing to their personality, wouldn't someone just be appealing to God? If so, why not cut out the middle man/the vessel and go to God directly?