Wood這首poem有什麼含意？

請問以下這首poem有什麼意思想表達？
還有這首poem給你什麼感覺? 你腦海浮現出什麼畫面？
[visuals both within the text and within your vision of the text (what images do you see in your mind's eye when you hear this poem?)[
我想要一些靈感來做一本picture book. THANKS!!
　
　
WOOD By Naomi Shihab Nye
　
The silence of a desk
is good to return to
after conversations with human beings
where sentences went up
and some went down.
　　　
The drawers in the desk
are smaller than the drawers of the heart
but more predictable.
If you place something here,
it will be waiting when you get back.
　
Hard to imagine the heart begin so plain,
holding no more than what it is given
when all around the earth stretches out
its giant fields.
　　　　　
The heart coasts through fields, gathering.
The heart comes and goes like a crow.
　　　　　
When the desk waits in the room
where light and dark revolve so quietly
it is as if nothing happens, as if the shadow sleeping inside the wood
slides out for a few hours
and folds in again, still empty.
　　　
As if the papers with words on them
were written by wood that, slowly,
would last that long.