It is thought that the virus is a degeneration from a more complex life form. It may at one time have been capable of independent life. Now has fallen to the borderline between living and dead matter. It can exhibit living qualities only in a host, by using the life of another-the renunciation of life itself, a falling towards inorganic, inflexible machine, towards dead matter

Letters to Allen Ginsberg, 1953-1957 (ed. 1982)