Full Idea
Science deals with the phenomena, ..but it is metaphysics, and only metaphysics, that tells us what ultimately exists.
Gist of Idea
Science studies phenomena, but only metaphysics tells us what exists
Source
Stephen Mumford (Laws in Nature [2004], 01.2)
Book Reference
Mumford,Stephen: 'Laws in Nature' [Routledge 2006], p.6