Full Idea
Those who assert that the universe is one and a single nature, when they try to give the causes of generation and destruction, miss out the cause of movement.
Gist of Idea
People who say that the cosmos is one forget that they must explain movement
Source
comment on Parmenides (fragments/reports [c.474 BCE]) by Aristotle - Metaphysics 988b
Book Reference
Aristotle: 'Metaphysics', ed/tr. Lawson-Tancred,Hugh [Penguin 1998], p.28