What does it mean for Su Dongpo to look at Buddha statues?

"Su Dongpo looked at the Buddha statue with shit" is a famous ancient joke allusion. It tells that when Su Dongpo visited the Buddha statue, he found a lump of shit on the head of the Buddha statue. He took out a handkerchief to wipe it, but the It didn't come off, so he wiped it off with his hair.

The source of this allusion is the poem "Looking at the Buddha Statue" written by the Song Dynasty scholar Su Shi: "Su Dongpo looked at the Buddha statue and saw a lump of dirt on his head. He wiped it with a handkerchief. If it couldn't be wiped away, he only used his head. This allusion illustrates Su Shi respected Buddhism. He believed that Buddhism was a noble religion, so he used his hair to wipe away the shit to express his awe of Buddhism.

Once Su Dongpo was with Foyin. After meditating, the two of them started chatting. Su Dongpo asked Foyin: "What do you think I look like when I meditate?" Foyin glanced at Su Dongpo and said, "I think you look like a Buddha." Su Dongpo saw that Foyin was wearing a yellow robe. He couldn't help but said: "I see you look like shit when you meditate! Foyin smiled and said nothing

Su Dongpo was very happy and went home and said to Su Xiaomei: "Old I have never won a Zen discussion with Foyin, but this time I came back with a big victory." As a result, when Su Dongpo told Su Xiaomei what happened, Su Xiaomei said: "Brother, you lost even more miserably this time!" Why? Buddha? Yin looks like you are like a Buddha because he only has Buddha in his heart, so everything he sees is Buddha; and what about you, brother?