However, to think with perfect clarity in a poetic sense one must first rid oneself of a great deal of intellectual encumbrance, including all dogmatic doctrinal prepossessions: membership of any political party or religious sect or literary school deforms the poetic sense – as it were, introduces something irrelevant and destructive into the magic circle, drawn with a rowan, hazel or willow rod, within which the poet insulates himself for the poetic act.