Full Idea
How can the Forms, while being the substances of things, have being separately from them?
Gist of Idea
How can the Forms both be the substance of things and exist separately from them?
Source
Aristotle (Metaphysics [c.324 BCE], 1080a01)
Book Reference
Aristotle: 'Metaphysics', ed/tr. Lawson-Tancred,Hugh [Penguin 1998], p.406