Maid Lotus came back with Sumeru Mustard Mantra. Though there were explanations beside it, they still found the mantra difficult to practice.
An enormous Sumeru Mountain could be wrapped up into a small mustard seed. The words from the scripture contained Buddhist doctrines and they were obscure. This sentence was the instruction of Internal Strength. It was the first trial of belief. Anyone who tried to practice this mantra needed to pass it first.
To pass the trial, the participant first needed to have faith in Buddhist doctrines. Then, he needed to believe that it contained all the Internal Strength in the world; once the participant mastered it, he would be invincible.
Gu Shenwei and Maid Lotus couldn't even pass the first trial. They only had the most superficial knowledge of Buddhist doctrines. And their principles went against Buddhist doctrines.