What is the crowning touch of the poem Crossing the Watershed?

Turn heartless things into feelings, and describe the author's karma and feelings with streams crossing the watershed. The stream is a natural thing without feelings, but the stream in front of us seems to have feelings. Here, "ruthlessness" leads to "sentimentality" and highlights "sentimentality". The word "sentient beings" is an eye, and the following three sentences are all described around it. The proper use of the word "like" reveals that this is just a subjective feeling that poets sometimes feel. If you change the word "que", you will feel too stressed and solid, but you can affirm and emphasize the sadness of the stream and give it moving human beauty; Changing the word "ye" will inevitably cover up the priority and make "ruthlessness" and "sentient beings" equally divided. Only this word "image" has a subtle meaning, which is consistent with the style of the whole poem. This sentence points out the "sentient beings" and at the same time sets up suspense to guide readers to pay attention to the following answers.