There are countless avenues in the world, they open from heaven and earth, escape into all things, and give birth to the universe. A saint observed its trajectory and gained supernatural powers. He summarized its outline in writing and spread it to all living beings. All living beings belong to the yin and yang and the five elements, and they are good at different things. Therefore, the great road is divided into categories, which are divided into those with and without. The ancestors were many simple people, and the Tao foundation was mostly tangible things. In the next thousand years, wisdom gradually opened up, the seven emotions grew, and the invisible foundation was established. It is difficult to practice the invisible path, among which the "path of love" is the most difficult. Five thousand years later, an immortal created the path of ruthlessness. However, love is invisible, so how can it be ruthless? Sentient beings feel that the path is difficult and no one teaches it, so they hide the method and do not know its name. ——"The Ruthless Way? Wedge"