Dissonance is disquieting because to hold two ideas that contradict each other is to flirt with absurdity, and, as Albert Camus observed, we are creatures who spend our lives trying to convince ourselves that our existence is not absurd. At the heart of it, Festinger’s theory is about how people strive to make sense out of contradictory ideas and lead lives that are, at least in their own minds, consistent and meaningful.