It can certainly be disheartening when we realize that change in our character doesn’t happen overnight. Yet how could being transformed into God’s image be anything but a life-long process? Transformation is designed to take place in degrees over time. It’s what being changed from “glory to glory” means. And submitting to God step by step makes it so much easier for transformation to progress the way God planned.
It’s also why we must guard against slipping back into sin when tempted. None of us is immune to falling into sin through the weakness of the flesh. This is dangerous ground, because sin stands at the head of a trail leading in the wrong direction. Once we’ve set ourselves on that badly chosen path it takes some undoing to get back to where we started from. Anyone who’s been there will tell you: “Don’t even think about it.”