The Mystical Theology and The Celestial Hierarchies hold an undisputed place among the mystical writings of all time, and Dionysius the Areopagite played a significant role in the transmission of Neoplatonic ideas into Christian theology. The Mystical Theology, is the classic treatise on the Via Negativa, which describes the ascent of the human soul to God, through a condition of unknowing, culminating in the silence of the Divine Darkness. The Celestial Hierarchies describes the angelic choirs, in whose providential care all created things dwell. Through the threefold process of purgation, illumination and perfective-union, the angelic intelligences assist the soul in making this ascent to God. How God may be known and spoken of, how the finite might approach the Infinite, how all created things come forth from the One Source - these were the deepest theological subjects treated in the writings of Dionysius the Areopagite, and his expositions earned him the close attention and veneration of generations of mystics and theologians. It is hardly possible says Evelyn Underhill to underestimate the influence of this Father of Christian Mysticism. St Deonise saith was sufficient authority in itself. Included in this new edition are the first English translation of The Mystical Theology, made by the author of The Cloud of Unknowing, and the Latin versions, upon which it was based. The translation is entitled Deonise Hid Diuinite (Hid translates the Latin mystica, and Diuinite or Divinite refers not only to Godhead, but also the study of the nature and attributes of God). The influence Dionysius had on mystics of the Western tradition is also indicated by a selection of quotations in the remaining appendices.