The possibility of the Self Spirit Fusion technique

As they were revolving, the disparity between the two energies was clearly lessened.

It wasn't obvious on the surface but for Lan Xuanyu, this was a sort of intuition. Nana once told him before that the intuition that a Soul Master developed in the course of cultivation was the most accurate. This sort of intuition could give a Soul Master many things - one must trust his or her intuition as this could be considered a moment of enlightenment.

Which meant that if one's Soul Power decreased by a level, it wasn't necessarily a bad thing?

Just at this moment, he realized a different change again. To his surprise, in the deepest part of his vortex, there seemed to be a fuzzy spot of light in the middle. He noticed this spot of light because its color was different from the rest.