Full Idea
The concept of the Other Person as expression of a possible world in a perceptual field leads us to consider the components of this field in a new way.
Gist of Idea
Other people completely revise our perceptions, because they are possible worlds
Source
G Deleuze / F Guattari (What is Philosophy? [1991], 1.1)
Book Reference
Deleuze/Guattari: 'What is Philosophy?' [Verso 1994], p.18
A Reaction
I like the idea that other people are possible worlds. You can give reductionist accounts of the human animal till the cows come home, but when one walk into your visual field, the mind takes off. See Crusoe and Friday.