Full Idea
Emotion is a phenomenon of belief. Consciousness does not limit itself to the projection of affective meanings upon the world around it; it lives the new world it has thereby constituted.
Gist of Idea
Emotions makes us believe in and live in a new world
Source
Jean-Paul Sartre (Sketch for a Theory of the Emotions [1939], §III)
A Reaction
There seems to be an implied anti-realism in this, since the emotions prevent us from relating more objectively to the world. The 'magic' seems to be compulsory.
Book Reference
Sartre,Jean-Paul: 'Sketch for a Theory of Emotions' [Routledge 1994], p.51