Everyone Sang

The poet uses a metaphor when comparing the speaker to a bird in line 3 "as prisioned birds musr find in freedom". this helps the reader understand exaclty how the spaker felt when everyone stared singing. it reinforces te intensity of his delight. like freedom comes to a bird who could have lost all hopes of living outside of his imprisionment, this delight comes filled with not only happnines, but aldo relief and hope.
The simile of the sunset in like 7 reinforces the closure of the momoment's idealism and feedom. as the sunset marks the end of the day, the speaker also expresses his feelings towards the end of what brought such horror. however, after the sunset, comes the night. the poet could have used the word sunrise instead of sunset, marking the end of bad times and the approach of good times. using the word sunset, he reinforced the idea that, ike the sun, beauty fades away and reality takes over.
In line 9, the poet uses another simile, "everyone was a bird; and the song was wordless; the singin will never be done". the poet makes "everyone" the "prisioned birds", but because the song is "wordless", the possibility of "freedom" can never be achieved. Because the words cannot be expressed, people no longer have an outlet for joy or escape.