Today’s Daf Yomi page, Eruvin 52, presents us with an image of a man standing with one foot inside the boundaries of the eruv and another outside. Why do the rabbis conjure such a strange case? Rabbi Dovid Bashevkin returns to argue that the rabbis were so obsessed with geographic boundaries because they realized that holiness, like community, was only possible if practiced in a specific and clearly defined place. What mystical meaning did the great hassidic master Rabbi Tzadok find in thinking about eruvin? Listen and find out.