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

What this quote means by James E. Faust is that you be you don't get in any other person block or else you'll end up regreting it later in life cause how about if there doing bad stuff and your a good person it's not good turning into a bad person be you! You'll eventually make it to the top of your block, no need for you to follow other peoples steps