Poetry’s medium is the ...

Poetry’s medium is the individual chest and throat and mouth of whoever undertakes to say the poem.
 Robert Pinsky

Quotes from the same author

In the particular presence of memorable language we can find a reminder of our ability to know and retain knowledge itself: the brightness wherein all things come to see.
 Robert Pinsky
There is something cathartic about having absolute loss articulated.
 Robert Pinsky
Poetic language is singularly appropriate for recounting the life of the king who is traditionally accepted as the author of the poetic psalms, some of which are included in the narrative.
 Robert Pinsky
The medium of poetry is not words, the medium of poetry is not lines-it is the motion of air inside the human body, coming out through the chest and the voice box and through the mouth to shape sounds that have meaning. It's bodily.
 Robert Pinsky
The medium of poetry is a human body: the column of air inside the chest, shaped into signifying sounds in the larynx and the mouth. In this sense, poetry is just as physical or bodily an art as dancing.
 Robert Pinsky