Board Thread:General Discussion/@comment-25782967-20131011232747/@comment-2089817-20131012051434

Chakra and Ki are the same thing theoretically. Chakra is formed from a proper mixture of physical energy, which is from within, and spiritual energy, which is gained through experience. Ki is the same thing, energies from both the internal and external balanced by the mind's focus and concentration. Ki itself can do the same thing as reiatsu, projecting it outwards through emotion and thought. Chakra has revealed itself to do the same thing. Reiryoku is the same as Ki, for Souls. Even though they lack a physical body, they still have the energy present in their reishi structure and energy generated by their souls, which combine to form their reiryoku. There is no "ultimate energy".