Mystical theology is the branch of theology in the Christian tradition that deals with divine encounter"Mystical theology explores and interprets every doctrine to help believers find there a doorway into a living, transformative encounter with the divine reality to which, Christians believe, their theological language is meant to point." Introduction, and the self-communication of God with the faithful;"Understood in its ancient expansive sense, mystical theology is not a sub-discipline, attending to particular states of spiritual experience; rather it is the Christian theological mind itself whenever it seeks to recognize and understand more deeply the hidden (i.e. mystical) self-communication of God in all things, at work to achieve their reconciling, healing, and perfecting, their greatest possible participation in God. " Abstract, such as to explain mystical practices and states, as induced by contemplative practices such as contemplative prayer, called theoria from the Greek for contemplation.

It can be contrasted to an extent with propositional theology e.g., systematic theology, dogmatic theology, scholastic theology, ecclesiology or treated as their forerunner: its subject and aim is not knowledge but divine encounter.

Early Christianity

Early Alexandrian tradition According to Origen (184/185–253/254AD) and the Alexandrian theology,"The influence of Greek philosophy on the Christian religion, though always active, reached its height the moment the latter entered the stage of its history at which it developed its own theology. This happened in the school of Alexandria. But it may well be said that Christianity came to develop a theology and to feel the urgent need of it because Greek philosophy had always insisted on a rational approach to the problem with which religion is concerned and thereby had set an example" (Werner Jaeger, Two Rediscovered Works of Ancient Christian Literature: Gregory of Nyssa and Macarius (Brill, Leiden 1954), p. 22). theoria is the knowledge of God in creation and of sensible things, and thus their contemplation intellectually (150–400AD) (see Clement of Alexandria, and Evagrius Ponticus). This knowledge and contemplation leads to communion with God akin to Divine Providence.Alexandrian tradition, in: The vision of God, Vladimir Lossky, Faith Press, 1963 via books.google.comThe life of Moses Oasis of wisdom via books.google.com

St. Macarius of Egypt In the theological tradition of Macarius of Egypt (ca. 300–391AD) and Pseudo-Macarius, theoria is the point of interaction between God and the human in the heart of the person, manifesting spiritual gifts to the human heart.

The highest form of contemplation originates in the heart (see agape), a higher form of contemplation than that of the intellect.The vision of God By V Lossky page 106 page 113 The concept that theoria is allotted to each unique individual by their capacity to comprehend God is consistent. This is also the tradition of theoria, as taught by St. Symeon the New Theologian (949–1022AD), that one cannot be a theologian unless one sees the hypostases of God or the uncreated light.Symeon the New Theologian: the discourses By Saint Symeon (the New Theologian), C. J. De Catanzaro pg 22-23 Symeon the New Theologian: the discourses By Saint Symeon (the New Theologian), C. J. De Catanzaro pg 22-23 Saint Gregory insists that to theologize "is permitted only to those who have passed examinations and have reached theoria, and who have been previously purified in soul and body, or at least are being purified." This experience cultivates humility, meekness and the love of the human race that the Triune God has created. This invisible fire in the heart for humanity is manifest in absolute kindness and love for one's neighbor akin to selfless humility, agape or love, growing from mortification, kenosis, or epiclesis. This agape, or holy fire, is the essence of Orthodoxy.Marcus Plested: The Macarian Legacy: The Place of Macarius-Symeon in the Eastern Christian Tradition (Oxford Theological Monographs 2004) ()

Cappadocian tradition In the Cappadocian school of thought (Saint Basil, Saint Gregory of Nyssa, and Saint Gregory Nazianzus) (350–400AD), theoria is the experience of the highest or absolute truth, realized by complete union with God. It is entering the 'Cloud of Unknowing', which is beyond rational understanding, and can be embraced only in love of God (Agape or Awe). The Cappadocian fathers went beyond the intellectual contemplation of the Alexandrian fathers. This was to begin with the seminal work Philokalia, which, through hesychasm, leads to Phronema and finally theosis, which is validated by theoria. One must move beyond gnosis to faith (meta-gnosis). Through ignorance, one moves beyond knowledge and being, this contemplation being theoria. In this tradition, theoria means understanding that the Uncreated cannot be grasped by the logical or rational mind, but only by the whole person (unity of heart and mind); this perception is that of the nous. God was knowable in his manifestations, but ultimately, one must transcend knowledge or gnosis, since knowledge is based on reflection, and because gnosis is limited and can become a barrier between man and God (as an idolatry). If one wishes to commune with God, one must enter into the Divine filial relation with God the Father through Jesus Christ, one in ousia with the Father, which results in pure faith without any preconceived notions of God. At this point, one can commune with God just as Moses did.Vladimir Lossky The vision of God Faith Press, 1963 via books.google.comByzantine theology via books.google.comGod's rule via books.google.com Gregory of Nyssa presented as the culmination of the Christian religion the contemplation of the divine Being and its eternal Will.Werner Jaeger, "Two Rediscovered Works of Ancient Christian Literature (Brill, Leiden 1954), p. 23

Pseudo-Dionysius the Areopagite's apophaticism

Pseudo-Dionysius the Areopagite (5th to early 6th century; writing before 532), himself influenced by the Neoplatonic philosopher Proclus, had a strong impact on Christian thought and practice, both east and west. Theoria is the main theme of Dionysius’ work called "The Mystical Theology".Dionysius the Areopagite, The Mystical Theology in C.E. Rolt (Translator) The Mystical Theology and the Divine Names, Dover Publications, 2004. Pages 191-192 In chapter 1, Dionysius says that God dwells in divine darkness i.e. God is unknowable through sense and reason. Therefore, a person must leave behind the activity of sense and reason and enter into spiritual union with God. Through spiritual union with God (theosis), the mystic is granted theoria and through this vision is ultimately given knowledge of God. In the tradition of Dionysus the Areopagite, theoria is the lifting up of the individual out of time, space and created being, while the Triune God reaches down, or descends, to the hesychast. This process is also known as ekstasis ("mystical ecstasy").

While theoria is possible through prayer, it is attained in a perfect way through the Eucharist. Perfect vision of the deity, perceptible in its uncreated light, is the "mystery of the eighth day".Vladimir Lossky, The Mystical Theology of the Eastern Church, St. Vladimir’s Seminary Press, p. 220. The eighth day is the day of the Eucharist but it also has an eschatological dimension as it is the day outside of the week i.e. beyond time. It is the start of a new eon in human history. Through the Eucharist people experience the eternity of God who transcends time and space.

The Dionysian writings and their mystical teaching were universally accepted throughout the East, amongst both Chalcedonians and non-Chalcedonians. St. Gregory Palamas, for example, in referring to these writings, calls the author, "an unerring beholder of divine things".

In western Christianity Dionysius's "via negativa" was particularly influential in the fourteenth and fifteenth centuries, on western mystics such as Marguerite Porete, Meister Eckhart, John Tauler, Jan van Ruusbroec, the author of The Cloud of Unknowing (who made an expanded Middle English translation of Dionysius' Mystical Theology), Jean Gerson, Nicholas of Cusa, Denys the Carthusian, Julian of Norwich and Harphius Herp. His influence can also be traced in the Spanish Carmelite thought of the sixteenth century among Teresa of Avila and John of the Cross.Jean LeClercq, 'Influence and noninfluence of Dionysius in the Western Middle Ages', in Pseudo-Dionysius: The Complete Works, trans. Colm Luibheid, (New York: Paulist Press, 1987), pp25-33

Eastern Orthodox Church

Symeon the New Theologian

Symeon the New Theologian (sometimes spelled "Simeon") (; 949–1022 AD) was a Byzantine Christian monk and poet who was the last of three saints canonized by the Eastern Orthodox church and given the title of "Theologian" (along with John the Apostle and Gregory of Nazianzus). "Theologian" was not applied to Symeon in the modern academic sense of theological study; the title was designed only to recognize someone who spoke from personal experience of the vision of God. One of his principal teachings was that humans could and should experience theoria (literally "contemplation," or direct experience of God).

Symeon repeatedly describes the experience of divine light in his writings, as both an inward and outward mystical experience. These experiences began in his youth, and continued all during his life. They came to him during inward prayer and contemplation, and were associated with a feeling of indescribable joy, as well as the intellectual understanding that the light was a vision of God. In his writings, he spoke directly to God about the experience variously as "the pure Light of your face" and "You deigned to reveal Your face to me like a formless sun." He also described the light as the grace of God, and taught that its experience was associated with a mind that was completely still and had transcended itself. At times he described the light speaking to him with kindness, and explaining who it was.Krivocheine 1986, pp. 215–229.

A central theme throughout Symeon's teachings and writings is that all Christians should aspire to have actual direct experience of God in deep contemplation, or theoria. Regarding his own mystical experiences, he presented them not as unique to himself, but as the norm for all Christians. He taught that the experience came after purification through prayer, repentance, and asceticism. He especially called on his monks to take on the traditional charismatic and prophetic role in the Church.deCatanzaro 1980, p. 2.

In his writings, Symeon emphasized the power of the Holy Spirit to transform, and the profound mystical union with God that is the result of a holy life. Symeon referred to this as the Baptism of the Holy Spirit, compared to the more ritualistic Baptism of water. Symeon believed that Christianity had descended into formulae and church ritual, which for many people replaced the earlier emphasis on actual and direct experience of God.deCatanzaro 1980, p. 16. The Discourses express Symeon's strong conviction that the life of a Christian must be much more than mere observance of rules, and must include personal experience of the presence of the living Christ. Symeon describes his own conversion and mystical experience of the divine light.deCatanzaro 1980, p. xvii. Even though his call to do more than just what was proscribed by the rules was minor in comparison to some of his other teachings, "his challenge to religious conventionality and formalism raised a storm of controversy."

Palamism and the Hesychast controversy