Why does Van Gogh quote his own poem in Sunflower in the Light?

3. On the other hand, sunflower's heroic feelings of chasing the sun, and its ambition of knowing what it can't do, are reminiscent of Kuafu chasing the sun in China mythology and Icarus chasing the sun in Greek mythology? 1? Therefore, in my recent poem "Sunflower", I said: You can't earn it. Kuafu can't fly. Icarus's daily cycle is from dawn to dusk, twisting his unyielding neck and holding his head high in pursuit of high-hanging calls. Yu Guangzhong was inspired by the auction paintings when he created Sunflower. These words are his praise for Van Gogh's persistent pursuit of good things. "Sunflower" Author:-Imitation Bian Shi mallet was auctioned in Christie's Hall, and it was sold at a high price of 39 million yuan. The nervous breath of the audience was bought out, and the envious eyes of the whole world could not buy it back. It was broken, an ear could not be bought back, it was burnt, a red hair could not be bought back, it was loose, and a bad tooth could not be bought back. The 37-year-old mallet was hastily raised and received a warm welcome. Facing a lgonely heart, follow red hair, rotten teeth, nightmares, epilepsy, diaries and letters, doctors and sickbeds, thunderbolts, generous hearts and sunflowers everywhere. Postscript:1On March 30th, 968, the 97th anniversary of Van Gogh's birth, one of his sunflowers was sold at Christie's in London.