Someone else could solve what he had been unable to solve for so many years with just a pill. This showed that the gap between him and Charlie was really big and incomparable.
It was also at this moment that he suddenly felt incredibly grateful. He was happy for making the decision to stay by Charlie’s side to serve him and do his best for Charlie.
If it was not for this decision, he would never have been able to discover the marvelous feeling of breaking through to the Great Perfection Real