 By repeatedly emphasizing his doubts about philosophy’s ability to ground a universal morality, Strauss suggests that revelation remains and must remain a continual moral challenge for philosophy (see also JPCM; NRH, pp. 106–107; PAW, p. 140). To be sure, Strauss’s is not an argument for revelation. And Strauss himself was not a believer. But Strauss’s arguments about revelation do offer the believer intellectual resources with which to challenge the philosopher and for this reason Strauss is neither indifferent to nor does he reject revelation. As Strauss concludes his essay on Halevi, “One has not to be naturally pious, he has merely to have a passionate interest in genuine morality in order to long with all his heart for revelation: moral man as such is the potential believer” (PAW, p. 140, emphasis added).