What is Poetry?

One of the many great answers - 

"The Key That No One Has Lost" 

Poetry serves no purpose, I am told
and trees caress one another in the forest
with blue roots and twigs ruffling to the wind, 
greeting with birds the Southern Cross
Poetry is the deep murmur of the murdered
the rumors of leaves in the fall, the sorrow
for the boy who preserves the tongue
but has lost the soul 
Poetry, poetry, is a gesture, a landscape, 
your eyes and my eyes, girl; ears, heart
the same music. And I say no more, because
no one will find the key that no one has lost
And poetry is the chant of my ancestors
a winter day that burns and withers
this melancholy so personal." 

- Elicura Chihuailaf 

Found in the great anthology Barbaric Vast & Wild