 This sense of absurdity makes existentialists more accepting of paradoxes than rationalists. Whereas rationalists nervously view paradoxes as a challenge to the authority of reason, existentialists welcome them as opportunities to correct unrealistic hopes. Existentialists are fond of ironies and do not withdraw reflexively from the pain of contradiction. They Stoically introspect upon the inconsistency in the hope of achieving a resolution that does justice to the three dimensionality of deep philosophical problems. For instance, Heidegger is sensitive to the hazards of saying that nothing exists. Like an electrician who must twist and bend a wire to make it travel through an intricate hole, the metaphysician must twist and bend a sentence to probe deeply into the nature of being.