Full Idea
All the passions, called passions of the mind, consist of appetite and aversion, except pure pleasure and pain.
Gist of Idea
Apart from pleasure and pain, the only emotions are appetite and aversion
Source
Thomas Hobbes (De Corpore (Elements, First Section) [1655], 4.25.13)
Book Reference
Hobbes,Thomas: 'Metaphysical Writings', ed/tr. Calkins,Mary Whiton [Open Court 1905], p.134
A Reaction
He now faces the challenge of explaining all the many other emotions in terms of these two. Good luck with that, Thomas.