Bodhi has no trees, and the mirror is not a stage. There is nothing, so there is no dust. Literally: Bodhi has no trees, and the mirror platform is not a platform. This poem was written by Huineng. At that time, Huineng was only in the temple for more than eight months, doing chores in the backyard all day. He overheard a young monk singing this beautiful song, thinking that he had never seen sex before. So I recited a poem and asked someone to write it on the wall, which won Hongren's appreciation and passed on the vestments. The essence of this poem is to point directly at people's hearts and see nature become Buddha. Both the bodhi tree and the mirror have a sense of space. Whoever has a sense of space must be relative and cannot be used as a metaphor for self. Self-nature has nothing to do with cultivation and acquisition. It is an absolute realm in itself. Everyone has a bright self. As long as it is not polluted, it can be naturally revealed. Therefore, it is impossible to see the essence from practice. Self-nature is "no repair, no permission, no gain, no loss" This is an epiphany.