These two moving studies by the eminent Orthodox theologian and sophiologist Father Sergei Bulgakov are remarkable in many ways. The first is a unique consideration--from the point of view of Eastern Christianity--of the Holy Grail, the chalice used by Joseph of Arimathea to catch the blood and water as it flowed from Jesus' side when it was pierced on the Cross by the spear of Longinus. This moment is described in John 19:34. Bulgakov's essay...