Full Idea
A mind is an organ of representation.
Clarification
'Representation' involves having content or meaning
Gist of Idea
A mind is an organ of representation
Source
David Lewis (Lewis: reduction of mind (on himself) [1994], p.421)
Book Reference
'A Companion to the Philosophy of Mind', ed/tr. Guttenplan,Samuel [Blackwell 1995], p.421
A Reaction
This does not seem to necessarily involve awareness, so it seems to put intentionality at the centre of things. It is a good slogan.