As to the poetical Character itself (I mean that sort of which, if I am any thing, I am a Member; that sort distinguished from the wordsworthian or egotistical sublime; which is a thing per se and stands alone) it is not itself - it has no self - it is every thing and nothing - It has no character - it enjoys light and shade; it lives in gusto, be it foul or fair, high or low, rich or poor, mean or elevated - It has as much delight in conceiving an Iago as an Imogen. What shocks the virtuous philosopher, delights the camelion Poet. It does no harm from its relish of the dark side of things any more than from its taste for the bright one; because they both end in speculation. A Poet is the most unpoetical of any thing in existence; because he has no Identity - he is continually in for - and filling some other Body - The Sun, the Moon, the Sea and Men and Women who are creatures of impulse are poetical and have about them an unchangeable attribute - the poet has none; no identity - he is certainly the most unpoetical of all God's Creatures. If then he has no self, and if I am a Poet, where is the Wonder that I should say I would write no more? Might I not at that very instant have been cogitating on the Characters of Saturn and Ops? It is a wretched thing to confess; but is a very fact that not one word I ever utter can be taken for granted as an opinion growing out of my identical nature - how can it, when I have no nature? When I am in a room with People if I ever am free from speculating on creations of my own brain, then not myself goes home to myself: but the identity of every one in the room begins so to press upon me that I am in a very little time annihilated...
From a letter to Richard Woodhouse