How to understand the last paragraph of Ai Qing's The Sun?

So my heart/torn by the hand of fire/stale soul/abandoned by the river/I have confidence in human regeneration.

With the arrival of the sun, the poet himself was reborn, which convinced him that human beings were reborn. Here, the poet wrote "My heart was torn apart by the hand of flame", which made people see the action and seemed to hear the sound. This word "tears" vividly describes the power of the sun flame and the great determination of "I". It is not only in harmony with the style of the whole poem, but also echoes the word "roll" in front, which strengthens the strength of this poem.

The phrase "the sun is rolling towards me" in this poem was once questioned by Mr. Wen Yiduo. Mr. Wen Yiduo thinks that this poem should not be written like this, which shows a petty bourgeoisie sentiment. According to Mr Wen Yiduo, it is reasonable to write "I ran to the sun". Here, we don't say that Mr. Wen Yiduo is too harsh. Even from an artistic point of view, Mr. Wen Yiduo's advice is not enough. Because obviously, I ran to the sun, far less imposing than "the sun rolled towards me". Because "I" is small and has no luster, "the sun" is huge and radiant, and "the sun is rolling towards me" can show great momentum. Also, say poetically, "The sun is rolling towards me? Only in line with the original intention of the poem, it is written that the "sun" is active, that is to say, history is active. If the "sun" is rolled up to the present, then "I" and everything will have a chance of rebirth. ...