This sentence comes from "If there is an afterlife". It is a poem written by Sanmao.
Original text:
If there is an afterlife, be a tree and stand for eternity. There are no gestures of joy or sorrow, half of it is peaceful in the dust, half of it is flying in the wind; half of it is covered with shade, and half of it is bathed in sunshine. Very silent and very proud. Never rely on, never look for.
If there is an afterlife, if you want to turn into a gust of wind, a moment can become eternity. No sentimental feelings, no passionate eyes. Half of it is free and easy in the rain, and half of it is traveling in the spring light; When I am lonely, I go on a long journey alone, taking away all the faint thoughts, never missing and never falling in love;
If there is an afterlife, I will do it A bird flies across eternity without the trouble of getting lost. There is flaming hope in the east, a warm nest bed in the south, chasing away the setting sun to the west, and waking up the fragrance to the north. ?If there is an afterlife, I hope that every encounter can become eternal.
Extended information
There are rumors on the Internet about the poems included in Sanmao's "Written to Myself".
The original text is not a poem, but a paragraph. It comes from Qiu Qiong's novel "This Life Is Done", originally published on the Hongxiu Tianxiang website.
It was later added by Internet users, similar to how "The Farthest Distance in the World" was rumored to be a poem by Rabindranath Tagore, but it was actually a collective creation.
Reference: Baidu Encyclopedia - "If there is an afterlife"