Religious people know deep down that that is the most vulnerable area of their lives, and when others question it, they are liable to hit out and feel insulted. You know it is absolutely without proof, yet people still commit themselves totally to this belief. They cannot refute it because it is so central to their lives.
The most difficult thing about painting is the self-discipline. When I finish a job, I give myself a few days, but then I have to discipline myself quite fiercely if I want to do some painting that's worthwhile. Otherwise, you're just doodling. It's much easier when you're just told what you have to do.