Obedience 

"When obedience becomes our goal, it is no longer an irritation,: instead of a stumbling block, it becomes a building block." - James E. Faust 

What Faust is saying is that when you become obedient it is no longer a problem its just something that adds up to your life. Since that person is used to being obedient it no longer bothers that person because they are already used to it. That person is already obedient they don't have to stress about choosing the right and it might just come up naturally. When Faust refers to a building block he means that every time your obedient its just a building block that adds on to your life.