“All human beings are believers, not ‘knowers’ who know with certitude. Everything we know is grounded on presupposed beliefs that cannot be verified with more fundamental proof or certainty that provides us with assurance they are true. That is just as true for atheists as for religious adherents. The quest for foundationalist certainty . . . is a distinctly modern project, one launched as a response to the instabilities and uncertainties of early modern Europe. But that modern project has failed. There is no universal, rational foundation upon which indubitably certain knowledge can be built. All human knowing is built on believing. That is the human condition."