Sakyamuni Buddha practiced so hard to become a Buddha only because He wanted to help sentient beings. Left after life, He was also reborn as animals, humans and heavenly beings to have affinity with them. So that He could help them after He became a Buddha. So, we practice spiritually to attain wisdom. There is power within the wisdom. Without the true inner wisdom, there is no inner power. This wisdom also includes the inner power, the spiritual power and our innate power. Therefore, wisdom is also included in benevolence.