On the Heavens: A Biological View.

It is not that everything that is in motion is moved by something else (C. Guthrie in Aristotle, On the Heavens, The Loeb Classical Library, London 1939, XVII) nor that self-motion is impossible but rather that 'all motion is self-conceived for self-companionship (otherwise known as love)'.
~ Wald Wassermann, Biophysicist