“An existential faith is a hot, committed view of the world layered into the affective dispositions, habits and institutional priorities of its confessors. The intensity of commitment to it typically exceeds the power of the arguments and evidence advanced. On my reading, then, each thinker listed above is a carrier of a distinctive existential faith. The faith in which each is invested has not yet been established in a way that rules out of court every perspective except it. It is a contestable faith. This is not to deny that impressive, comparative considerations might be offered on its behalf, or that it might be subjected to critical interrogations that press its advocates to adjust this or that aspect of it. An existential faith is not immune to new argument and evidence, as I will try to show; commitment to it, rather, is seldom exhausted by them.”