“A thousand years earlier, a Cappadocian monk named Gregory of Nyssa was the first to see Moses’s cloud as a cipher for the spiritual life. “Moses’s vision began with light,” he wrote. “Afterwards God spoke to him in a cloud. But when Moses rose higher and became more perfect, he saw God in the darkness.”2 In the same way, Gregory said, those of us who wish to draw near to God should not be surprised when our vision goes cloudy, for this is a sign that we are approaching the opaque splendor of God. If we decide to keep going beyond the point where our eyes or minds are any help to us, we may finally arrive at the pinnacle of the spiritual journey toward God, which exists in complete and dazzling darkness.”