To whom does a Jew pray? Can He be described? Does He have a name? No, there is no description with which to imagine Him, no name with which to grasp Him. Even the pronoun “Him” implies too much to be true—as though He could be a third party, absent or present. Even the title “Infinite Light” misses the mark, as though He were only light. But He is not light. He is the source of light. At the source of all light, there is no absence or presence, no being or not being. There is only “You.” Here, now, known to all beings. And yet beyond the grasp of any...