There is no distinction between good and evil in the world. Only excessive selfish desires will lead to obsessions. Excessive obsessions are demons. If the demonic energy is too strong, there will be backlash. As the saying goes, "the beholder knows the truth." Only those who understand the Dao will understand all this. Most people, including the so-called immortals, cannot understand the Dao.
There is such a person at the lowest level in the world, with his simplest heart, he finally understands the law of the great road.