What is the moral of the last two sentences in Ji Hai Miscellaneous Works?

In the last two sentences of the poem, the poet turned to lyricism, expressing a high-spirited spirit: "Falling red is not a heartless thing, but turning into spring mud is more protective of flowers." What a novel poem this is. In the eyes of the ancients, fading and falling red is always a "heartless thing" that causes sighs and sadness; However, the author sees its sentimental and positive side, which is used to compare himself who resigned and retired, showing a spirit of unwilling to give up and continue to struggle, indicating that he will still contribute everything to the country and the nation after quitting the officialdom.