"Wild Fox Zen" is taken from a famous Zen case and is also a Buddhist myth. In Zen Buddhism, all monks who enter evil and have not yet realized it and call themselves enlightened, and Zen scholars denounce it as "wild fox Zen".
Zen Master Baizhang Huaihai is the successor of Zen Master Mazu Daoyi. Legend has it that one day, the lecture of Baizhang Zen Master ended, and all the monks left, and the only old man stayed there. The Zen Master asked, "Who is standing in front?"
The old man then replied, "I am not a human, but a wild fox. In the past, when I was an ancient Buddha, I practiced here in Baizhang Mountain. Later, a monk asked, "The great practitioners still have no cause or effect?" I replied, "Don't fall into the body of a fox for five hundred years. Now I ask the Zen Master to speak on my behalf. I hope to get rid of the body of a wild fox."
After hearing this, Zen Master Baizhang said, "May I ask."
The old man clasped his hands and asked, "The great practitioners still suffer from cause and effect?"
The old man replied, "I am not ignorant of cause and effect."
The old man gained great enlightenment and bowed to his word and left. The next day, Zen Master Baizhang led the people in the temple to the cave under the rock rock in the back mountain, and picked out a wild fox corpse with his stick, and instructed him to follow the rituals of the deceased monks to cremate.
The old man thought that practitioners could "not fall into cause and effect", but he fell into evil views and was a "big lie", but he was rewarded with the "wild fox body". Zen Master Baizhang’s “not obsessed with cause and effect” is the right path to enlightenment of Buddhism. Those who practice and enlighten the Tao cannot be exempted from the retribution of past karma. The difference lies in the fact that when they receive retribution, they no longer lose in the current karma and no longer suffer or have any reckless pain or troubles, so it is called "not ignorant of cause and effect".