Whether this was explicitly taught or implicitly caught, I grew up with the impression that when it comes to the Christian life, justification was step one and sanctification was step two and that once we get to step two there's no reason to revisit step one.
The gospel is not about a lifestyle that we live, it's about the law-fulfilling life that Christ lived.
God's grace is so counterintuitive and everything we do in our life is just based on conditions. You do this for me and I'll do that for you. Or if you don't do this for me, I won't do that for you. And God's grace works in a completely different direction.