"Poetry is of course not to be defined by its uses...It may effect revolutions in sensibility such as are periodically needed; may help to break up the conventional modes of perception and valuation which are perpetually forming, and make people see the world afresh, or some new part of it.  It may make us from time to time a little more aware of the deeper, unnamed feelings which form the substratum of our being, to which we rarely penetrate; for our lives are mostly a constant evasion of ourselves, and an evasion of the visible and sensible world.  But to say all this is only to say what you know already, if you have felt poetry and thought about your feelings."