Maximos the Confessor (580-662) occupies a unique position in the history of Byzantine philosophy, theology, and spirituality. His profound spiritual experiences and penetrating theological vision found complex and often astonishing expression in his unparalleled command of Greek philosophy, making him one of the most challenging and original Christian thinkers of all time. So thoroughly did his thought come to influence the Byzantine theological tradition that it is impossible to trace the subsequent history of Orthodox Christianity without knowledge of his work. The Ambigua (or "Book...