Sanctification, Repentance, and the Habit Loop
Introduction to Concept:
In his book The Power of Habit, Charles Duhigg explains something advertisers have known for quite some time: human beings can be trained to respond to cues with routines as long as there is a reward. He calls this the habit loop. It looks like this:

The idea is that when we have a cue, we usually will follow a certain routine that leads to a reward and if this cue occurs enough times it becomes a habit and is very difficult to break. Many habits have no particular reward but are still hard to break. Think about things Americans do not eat (cartilage, fat, and animal skin) that are good for you and if you do not eat these things, think about how gross it feels to try eating them.