This poem vividly depicts the image of a sick cow, which not only depicts its weak body shape, but also conveys its spirit of taking pains to get sick and aiming at all beings. This kind of praise for cattle is quite in line with the personality characteristics of cattle, hard-working, dedicated, nothing else. However, this poem is not about praising cows, but about "expressing one's aspiration" to express one's feelings and yearning for the author. As long as we can "know people and discuss the world" as the predecessors said, it is not difficult to see this.
Praise the personality traits of cattle, work tirelessly, work hard and complain, aim at all beings, and seek only dedication and nothing else. ——
"Holding on to things and expressing one's will" is to express one's feelings for the author by chanting cattle.