Respuesta :
He compares the poem to the moon, mainly because of the moon's slow, and gracious movement on the sky. According to the poet, "Leaving, as the moon behind the winter leaves" is the description of how the poem should slowly and carefully flow to the end, just like the moon during a winter night. Poem should be motionless - should capture reader's attention, and entangle him in it completely.
Answer:
He wants to emphasize that a poem's message of true emotions and experience should be as dateless and endless as the moon.