R. Fulop-Miller: In the sixteenth century there arose on Athos a controversy which shook the whole Orthodox world. A monk, after a long period of profound meditation on his navel, could see the divine light of Mount Tabor. His example was followed by many other monks who also saw "the Uncreated Light." The question was fought out through a series of Councils and finally decided in favour of the mystics by a Council at Constantinople, which declared the Light was really Divine.
-- Notebooks Category 22: Inspiration and the Overself > Chapter 4: Introduction To Mystical Glimpses > # 201