Spiritual power cultivation is a very profound process. In and of itself, it isn't very eye-catching and one may not even feel its growth while practicing. The method of cultivation is quite simple – sitting in silence and using one's spiritual power to sense everything around, while trying to expend as much energy as possible. Sky Scar discovered, the more he consumed, the more he was able to gain back after recovery through silent meditation. After nearly a week of intense cultivation, the soul power within his soul pearl became more condensed, and his spiritual power saw a significant increase.