Full Idea
Nothing is more usual than to apply to external bodies every internal sensation which they occasion.
Gist of Idea
Nothing is more usual than to apply to external bodies every internal sensation which they occasion
Source
Stathis Psillos (Causation and Explanation [2002], §1.8)
Book Reference
Psillos,Stathis: 'Causation and Explanation' [Acumen 2002], p.47
A Reaction
This is the core of Hume's is/ought claim - what he calls the mind 'spreading itself'. It is a powerful claim. Personally I think we have become TOO sceptical here, and have the delusion that crucial features of nature are created within our minds.