There is no good or evil in the world, only the law of life.
The practice of comprehending the world is called "Tao"; the practice of plundering the world is called "Demon"; the practice of relying on one's own self is called "Monster". None of the three roads is inherently dirty—the only ones that are dirty are those who walk on them.
Chen Shitou was an orphan picked up by an old Taoist priest from Songguan. At the age of nineteen, he went down the mountain to practice, with three coins in his pocket, the ability to brag, and a set of "health-preserving exercises" taught by his master - he always thought that they were health-preserving exercises.
It wasn't until he slapped that palm under the demon's claws, and the wind of the palm wrapped around the breath that he had practiced for more than ten years, that he vaguely understood: There was probably much more than this that the master had hidden from him for nineteen years.
Slaying demons, solving crimes, investigating old cases, and finding fox demons - along the way, he fights if he can win, runs if he can't, brags if he can't run, and carries it if he can't. He didn't have any big ambitions, he just wanted to live, and once he understood his life, he would ask: Who is the master, what's going on in this world, and why the sunny boy who invited him to have a meal - he smiled so beautifully.
The mortal world is rolling around, asking about immortality.
It's the characters that are bad, not the choices.