How is the rain the poem & the music of the earth?

I am the Poem
of the Earth, said the voice of the
rain.

In Whitman's poem "The
Voice of the Rain" the speaker asks the rain a question: "And who art
thou?"

The remainder of the poem provides the rain's
answer. The rain, like poetry, exists so as to be eternal. Like good poetry which can
withstand the ticking of time, rain exists eternally as
well.

I rise
impalpable out of the land and he bottomless
sea.

As  afollower of the
Transcendental movement, Whitman embraced an individuals intuition. Here, in regards to
intuition, poetry is influenced by Whitman's regard for nature. Whitman's initial
question to the rain supports this.

The rain, similar to
regarding nature to stimulate a mind and create a poem, resides in both the land and the
sea. Many poets get their inspiration from both of these places as
well.

All that
in them without me were only seeds, latent,
unborn;

This line refers to
the fact that poets, like the rain, find 'nourishment' in nature which allow their
poetry to exist-reflection on nature bring about the poems. The rain acknowledges the
fact that a seed cannot grow unless nourished by the
rain.

And
forever, by day and night, I give back life to my own origin,/ and make pure and
beautify it;

This line refers
to the fact that both rain and poets 'give back' to all around them. It is the purpose
of both nature and poets to purify and beautify the world- in a figurative and literal
way. Without the nourishment of the rain and the words of a poet the world would not be
as colorful a place.

As for a literal sense of the phrase
"music of the earth", think about how the rain sounds. Many poets have used the imagery
related to the sound of the rain hitting a metal roof, a window, or a person them self.
(Think "Rain on the Roof" by Kinney.)