From philosophy professor Hans Jonas's wonderful memoir, an episode about Leo Strauss to ponder:
With more on Strauss, Hannah Arendt, Martin Heidegger, and intellectual life during Weimar, WW II, and the post-war U.S.
On a fall day--it must have been in 1934--we went for a walk in Hyde Park. We'd walked along in silence for quite a while. Suddenly he turned to me and said, "I feel terrible." I said, "Me too." And why? It was Yom Kippur, the day of atonement, and both of us were not in the synagogue but were walking through Hyde Park. That was telling. For him much more than for me.... But for Strauss it was a source of torment. "I've done the equivalent of committing murder or breaking a loyalty oath or a sinning against something." This "I feel terrible" came straight from his soul. [p. 49]