What is the meaning of this poem/the theme and what it's all about? Thank you for the help! Rumors from an Aeolian Harp
By: Henry David Thoreau

There is a vale which none hath seen,
Where foot of man has never been,
Such as here lives with toil and strife,
An anxious and a sinful life.

There every virtue has its birth,
Ere it descends upon the earth,
And thither every deed returns,
Which in the generous bosom burns.

There love is warm, and youth is young,
And poetry is yet unsung.
For Virtue still adventures there,
And freely breathes her native air.

And ever, if you hearken well,
You still may hear its vesper bell,
And tread of high-souled men go by,
Their thoughts conversing with the sky.