方舟而济于河,有虚船来触舟,虽有惼心之人不怒;有一人在其上,则呼张歙之,一呼而不闻,再呼而不闻,于是三呼邪,则必以恶声随之。向也不怒而今也怒,向也虚而今也实。人能虚己以游世,其孰能害之? ——《庄子·外篇·山木》 Ark and in the river, there is a virtual ship to touch the boat, although the heart of the people do not anger; there is one on it, then call Zhang Yi, a call rather than smell, then call but not smell, so three call evil, then Accompanied by evil sound. Not to anger right now also anger, but also to the virtual reality. People can emptiness to travel around the world, what harm it? - “Chuang Tzu outside the mountain wood”