What are the main themes of the poem "The Song of Wandering Aengus." It is from the works of W.B. Yeats.

There are a number of themes apparent in this haunting,
romantic poem. First, there is a sense that nature possesses mystical and healing
powers, and that being in nature can cause true believers to have visions. Yeats wrote
often of fairies, a pervasive presence in Irish mythology. He also seemed to think of
some of the human women in his life as having fairy-like
qualities.

The "glimmering girl with apple blossom in her
hair" is a fairy being, beautiful and desirable, but unobtainable, just as Maud Gonn
was, Yeats' unrequited love. The protagonist of the poem wishes to return to the same
location, the hazel wood (hazel trees possess magical powers in Irish folklore), to see
the girl again. There is a theme of timelessness to his longing, and his hope. The fairy
is a being who will always be in this place, and the speaker is confident that when he
is "old with wandering" he will see her again.

In this way,
the fairy is also a metaphor for the peace and completion of death. The realm of the
fairies was comparable to the underworld, of the realm of the dead, and in some
locations humans, under certain conditions, could enter the world of the dead and return
to the world of the living. The "silver apples of the moon and golden apples of the sun"
also reflect themes of timelessness and immortality, a vision of the afterlife in which
the beauty of nature is a soothing presence.