Zhuang Zhou Mengdie, "Dream" is a very wonderful journey, but dream is not an accident, but a separation of human consciousness. There are many levels in this universe, and each level does not interfere with each other. Except when a person falls asleep, his consciousness will be separated and he will randomly enter one of the levels, possessing him in the sea of consciousness, and experiencing what he is experiencing. This is our 'dream'
Intention: cause and effect