Full Idea
The lower animals have no share in happiness, being completely incapable of contemplation.
Gist of Idea
Lower animals cannot be happy, because they cannot contemplate
Source
Aristotle (Nicomachean Ethics [c.334 BCE], 1178b25)
Book Reference
Aristotle: 'Ethics (Nicomachean)', ed/tr. ThomsonJ A K/TredennickH [Penguin 1976], p.333
A Reaction
I've heard it suggested that the recipe for human happiness is to be good looking and rather dim. Very few people can be seriously good at contemplation.