This poem is a contrast between the bright happy feelings that are often associated with the life giving properties of the day, with the dark, murky unpleasant chill of the night. Day is often used in reference to the peak of one's life, and the period of time where most of the joys of life are had. However, good times can never last eternally. With the passing of light comes the waking of dark. Dusk is often used to symbolize the hardships or the ending of ones life, or the time when all of the creatures of the sun retreat to the demons of the night. However, as with the day, the dark night will eventually pass, and the sun will come out once more. It is an ongoing, inexorable process. As such, it is the same with this poem as well.