There is a story about an old general who fought many battles and risked his life. After returning to the field, he took pleasure in collecting antiques. One day, when he was playing with one of his favorite ancient bottles, he accidentally almost got rid of it and was scared into a cold sweat. He suddenly realized: why did I risk my life for fear, and now how can I be scared into a cold sweat? A moment later, he realized-because I am obsessed with it, I will have the heart of being swayed by considerations of gain and loss; I must get rid of this infatuation and learn to be open-minded, so nothing can hurt me, so I threw the ancient bottle to the ground.