Obedience
"When  obedience becomes our goal, it is no longer an irritation; instead of a stumbling block."  ~ James E. Faust

      This quote means that when your obedient all the time you will be careful in life and that's why you would be a building block. If your irresponsible in life and you don't care than that means your a stumbling block.For example if your walking in the classroom and theirs a chair leg sticking out and you trip over it than your a stumbling block.  And if your a person who is always careful and watches were they step than you wont trip and that means that you are a building block.