Why did the Tang Priest in The Journey to the West learn from the scriptures?

In the original Journey to the West, 10 tells a story.

An arrogant dragon king came out to play and saw a fortune teller. He thought he was mysterious and made a bet.

The picture comes from the internet.

It's just a question of when it will rain or not. In order to win the gambling game, the Dragon King will be beheaded because he abused power for personal gain and violated the dogma. The executioner was none other than Wei Zhi, the prime minister of the Tang Dynasty. The Dragon King thought that although you Wei Zheng wanted to behead me, you are a courtier of Li Shimin, so you must listen to him.

So the Dragon King asked Emperor Taizong to stop Wei Zhi.

Li Shimin agreed, but Wei Zhi planned to kill the Dragon King in his sleep.

The Dragon King thinks that Li Shimin has broken his word, so he pesters Li Shimin every day. Li Shimin was finally killed by him.

Cui Panguan from Yamaraja Temple came to see the ghost of Li Shimin. After all, Emperor Taizong was the statue of the Ninth Five-Year Plan, so the civil servants in the underworld rushed to meet him. Only a few people don't give him face, that is, Li and Li Yuanji, who died tragically in the change of Xuanwu Gate, and those who were unhappy later.

When they came up, they were about to wrestle with Li Shimin, and finally they were dragged away by civil servants of the underworld.

Later, the judge took out the book of life and death, and saw that Li Shimin still had his birthday in 2 1 year, so he was going to put it back for him. Li Shimin thought it would be better to go to hell once.

As a tour guide, the judge took member Li Shimin from Naihe Bridge to the wandering city of death.

It is shocking that Li Shimin saw many people killed by him before he died. He asked the judge, "What should I do if these ghosts run for their lives like the Dragon King?"

The judge said, "Your Majesty, when you go to see the dead, you must have an amphibious meeting to cross over the innocent soul. Don't forget. If there were no complaints in the underworld, the world would enjoy a peaceful celebration. Everything that is bad can be corrected one by one, teaching the world to be good, and your children and grandchildren should be disciplined for a long time. "

Therefore, after the resurrection of Emperor Taizong, he immediately called the monks of the whole country to practice and preach the scriptures. Tang Sanzang went to the Western Heaven to learn Buddhist scriptures.

The story of Journey to the West is based on the story of Emperor Taizong's ghost. This book is a legend of a folk story, and it is one of the relics of the Tang Dynasty unearthed in Dunhuang Tibetan scriptures cave in the last century. The general idea is the same as that in The Journey to the West written by Wu Cheng'en, for reference.