A story "It's all in the mind"

A story - "It's all in the mind" by Ani Choying Dolma

Once there was a great teacher. She had many disciples. Among her many disciples, her son was also her disciple. So one day she decided to teach one of her sons. And to do that she went to look out for a corpse, a dead human body. So she found one and put it in a sack, brought it home, tied. And she called her son and said, "take this sack with you tonight. I would like you to make it your pillow tonight when you sleep." And when he asked what's in it, she said, "there is a dead goat in it." She didn't tell him there was a corpse in it. So as he was told there was a dead goat. He thought no problem and he took that sack and slept at night making it his pillow. He slept very well. The next day he came back to his mother and mother asked him "did you sleep well, son?" and he said, "yes". Then she had prepared another sack in which she actually had a dead goat in it. But when she gave it to him, she said, "here, take this sack today, there is a dead human in it. I want you to do the same thing as you did with the previous one, make it your pillow tonight when you sleep". The moment when he was told there is a corpse in it, he was hesitant. But as she was not only the mother but also the teacher, he had to obey her. So he took that sack and tried to sleep that night but he could not sleep well. He turned around the whole night. And the next morning, he went to see his mother again. The mother asked him the same question "did you sleep well, son?" and he said, "no". Then she asked him, "okay, open that sack that you were not able to sleep well with" . He opened it and there was just a dead goat in it. Then she asked him to open the previous sack, the sack he was able to sleep very well with, and there was the corpse.

It's all in the mind.

Source: https://youtu.be/etVHHa4IpeM (49:30-53:30)