Doctrines of Salvation 1:236; “SAINTS ARE THE BEST PEOPLE. We are, notwithstanding our weaknesses, the best people in the world. I do not say that boastingly, for I believe that this truth is evident to all who are willing to observe for themselves. We are morally clean, in every way equal, and in many ways superior to any other people.”
1 Samuel 2:3; “Talk no more so exceeding proudly; let not arrogancy come out of your mouth: for the LORD is a God of knowledge, and by him actions are weighed.”
This superiority of the Mormons is something the Christian has to overlook and know they need Jesus just like we do.