The other three people are foil, but they are all indispensable foil for the following reasons.
Because the Tang Priest made a mistake, and it was a mistake in public, Tathagata had to give up what he had to give up and demote him as an ordinary person.
But you can't keep your second apprentice as close as brothers in the world. You have to find a reason to recall him. The reason is too superficial and the task is too simple to offset his big mistake. So I decided to bring my second apprentice back to life in the form of learning from the scriptures.
But because the task is too arduous and the distance is too long. He can do it alone. Maybe you have to ask: Tang Priest is mortal. How can he do it alone? This is your naivety. If the leader wants you to finish it, you can. If the leader doesn't want you to finish, you can't play 1000 Monkey King. But in order to convince the public, we can't do too much publicity, so we decided to give him a few helpers to let these people who made mistakes share his light and make amends together. So the other three are the foil of Tathagata's memories of the two places.
Why do these three set off the Monkey King Pig Bajie and Friar Sand?
There is a simple reason. The people who made mistakes in heaven are Pig Bajie and Friar Sand. Their similarity is that they have no background. If Nezha made a mistake, it wouldn't have happened to them. There must be many people who make mistakes in heaven, but they are not as miserable as they are. After being punished in heaven, no one cares about them. So Guanyin took them. There is also a backstage that is not hard, and that is white.
And the Monkey King, the foil of Buddhist scriptures, a little more than them. Because he refuses to accept three management, it is unreasonable to have such a thing. You see, the jade emperor can't control it, the emperor on the ground can't control it, and the underground Yan can't control it. Is this good? And the Tathagata can't be directly destroyed. Because he didn't provoke Tathagata, who is a Buddha, the Monkey King is more or less a creature. You can't say it's ruined. It is difficult to convince the public. The slogan he uses to manage his followers is not to kill, right? How could he take the lead in killing the Monkey King? Neither can i. If you don't kill him, it's still a disaster. It's not a problem to keep pressing him. Let him study the scriptures. After all, he is very capable. If he can really concentrate on learning from the scriptures, after several years of tempering, it is estimated that he can get rid of his bad temper. This Tathagata was confident, because he believed that his second apprentice could do nothing else, and he also had a set of methods to grind people's will, so he chose the Monkey King, an enterprising team.
Now LZ understands why the four of them went to learn the scriptures?