What I have learned about this?
Scraping and painting takes time and effort. Sometimes it feels slow and tedious. Yet, you can see the difference, not always immediately, but it eventually becomes noticeable. Actually, I should say, some activities like painting primer on bare wood stand out to the eye. You can look back and glory in what you have done, because the results are so apparent. But sometimes brushing on white paint on white primer barely makes a difference visibly, especially depending on the lighting.
Well, growth in the spiritual life resembles painting. The process can be slow and tedious. We only allow ourselves to change slowly; we so often cling to our ingrained habits. Yet, as we seek to instill new spiritual habits, sometimes called spiritual exercises, change begins. Yes, sometimes some old habits immediately fall away, and the results are instant and noticeable (e.g. the alcoholic not drinking). On the other hand, the spirit of amusement often pulls people from God unknowingly, and people rarely seek to toss out this spiritual habit to find joy in the Lord. And when they do address the issue, the process sometimes moves like the turtle.
In painting whether the process is slow or fast, visible or invisible, the whole process is needed. Don't skip any. The spiritual life also may go slow or fast and be visible or invisible, but hold on and be patient, you will be renovated.