The literature of religious experience abounds in references to the pains and terrors overwhelming those who have come, too suddenly, face to face with some manifestation of the Mysterium tremendum. In theological language, this fear is due to the incompatibility between man’s egotism and the divine purity, between man’s self-aggravated separateness and the infinity of God.
—  Aldous Huxley, The Doors of Perception