"This isn't to say that our good works earn our salvation - we are saved only by grace (Ephesians 2:8). But the way we live proves the reality of our salvation. If a person has truly been saved, truly been justified by grace, it shows in a new lifestyle. Every genuine Christian is being sanctified. The process might be slow, it might move ahead in fits and starts, but if we've been justified, we will also begin to be sanctified."
~ Joshua Harris, Dug Down Deep