And here the ana­lo­gy of the medium comes in, which Yeats star­ted out, and which Cocteau in his Orphée, both the play and the pic­ture, used a car radio for, but which is essen­tial­ly the same thing. That essen­tial­ly you are some­thing which is being trans­mit­ted into, and the more that you clear your mind away from your­self, and the more also that you do some cen­so­ring – because there will be all sorts of things coming from your mind, from the depths of your mind, from things that you want, which will foul up the poem.