"When obedience becomes your goal, it is no longer an irritation; instead of a stumbling block, it becomes a building block." 

James E. Faust

I believe this means that when you start doing something often you dont see it as a struggle you see it as a life style. When you dont constantly think of doing something you should be doing no matter what it comes natural but if you are contently thinking of doing it, it begins to irritate you and frustrate you.  If you choose to be obedient you are choosing the right. When you choose the right you are doing good. Now, if you choose the wrong you are doing bad, not good and that is not being obedient. By being obedient you are making a better person yourself, not of others. If you show good character traits, one being obedient you are making a good person out of you. By being obedient you can also help change someone else. An example of not being obedient is not listening. If you listen you are obedient and if you dont then your not. Living a life style where you choose to be obedient and it just comes naturally is not so hard. But if you have to consistently be reminded than it can be irritating.