A close reading of Martin Buber’s seminal work, “I and Thou” (“Ich und Du,” 1923). Buber’s short but pithy work effected a revolution both in religious thinking and humanistic philosophy, both within Judaism and beyond it. In introducing the fundamental difference between “I-Thou” and “I-It” relationships, the revolution reached into the grammar of the phenomenon of the “interhuman.” We will read this text with intimate and thoughtful attention, and with reference to Buber’s works in philosophy, Hasidism and Biblical Studies, as well as resonant themes in Feuerbach, Cohen, Rosenzweig, Rosenstock-Huessy, and Marcel.