Yet in the cloister, the mind of Cantacuzene was still exercised by theological war. He sharpened a controversial pen against the Jews and Mahometans; 38 and in every state he defended with equal zeal the divine light of Mount Thabor, a memorable question which consummates the religious follies of the Greeks. The fakirs of India, 39 and the monks of the Oriental church, were alike persuaded, that in the total abstraction of the faculties of the mind and body, the purer spirit may ascend to the enjoyment and vision of the Deity. The opinion and practice of the monasteries of Mount Athos 40 will be best represented in the words of an abbot, who flourished in the eleventh century. “When thou art alone in thy cell,” says the ascetic teacher, “shut thy door, and seat thyself in a corner: raise thy mind above all things vain and transitory; recline thy beard and chin on thy breast; turn thy eyes and thy thoughts toward the middle of thy belly, the region of the navel; and search the place of the heart, the seat of the soul. At first, all will be dark and comfortless; but if you persevere day and night, you will feel an ineffable joy; and no sooner has the soul discovered the place of the heart, than it is involved in a mystic and ethereal light.” This light, the production of a distempered fancy, the creature of an empty stomach and an empty brain, was adored by the Quietists as the pure and perfect essence of God himself; and as long as the folly was confined to Mount Athos, the simple solitaries were not inquisitive how the divine essence could be a _material_ substance, or how an _immaterial_ substance could be perceived by the eyes of the body. But in the reign of the younger Andronicus, these monasteries were visited by Barlaam, 41 a Calabrian monk, who was equally skilled in philosophy and theology; who possessed the language of the Greeks and Latins; and whose versatile genius could maintain their opposite creeds, according to the interest of the moment. The indiscretion of an ascetic revealed to the curious traveller the secrets of mental prayer and Barlaam embraced the opportunity of ridiculing the Quietists, who placed the soul in the navel; of accusing the monks of Mount Athos of heresy and blasphemy. His attack compelled the more learned to renounce or dissemble the simple devotion of their brethren; and Gregory Palamas introduced a scholastic distinction between the essence and operation of God. His inaccessible essence dwells in the midst of an uncreated and eternal light; and this beatific vision of the saints had been manifested to the disciples on Mount Thabor, in the transfiguration of Christ. Yet this distinction could not escape the reproach of polytheism; the