Most of us feel that our emotions are reactions to those outside of us. Someone cuts us off in traffic, and we say that the other driver made us upset. A friend brings over food when we're sick, and we say the friend offered us comfort. But psychologist and neuroscientist Lisa Feldman Barrett argues that our feelings are not, in fact, responses to the world — they're really predictions about the world. And she says we can exercise more control over those predictions than we realize.

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