"From a scientific perspective, when ranking power, it is divided into levels one through nine to differentiate strength. First through third levels are for low-level cosmic civilizations, fourth through sixth levels are for middle cosmic civilizations, and seventh through ninth levels are for high-level cosmic civilizations. There are very strict boundaries between them, and they cannot be easily crossed."
"However, when ranking power from the perspective of psychics, there is some ambiguity, because it's akin to individual combat strength. Some abilities might be strong in a one-on-one situation but insignificant on a cosmic scale, yet the individual can still be considered a great psychic."
