The whole sentence of "forgetfulness" is "forgetfulness, but it can be changed slowly", which comes from a letter to his wife Yue. The moral is that bloom is in the field, so you can enjoy the flowers and come back slowly, or the flowers on the path are blooming, and I can wait for you to come back slowly.
Extended data
King Qian Wusu didn't know this book, but sent a book to his wife. The book said, "A exhausted love, you can go home slowly." -but a few words, and infinite posture, although the literati wrote, it is beyond it.
Dongpo played it as "Three Poems of Flowers on a Stranger": "As soon as you enjoy flying butterflies, the mountains and rivers are still strange; The adherents died several times, and the wandering girl slowly returned to the song! "