Hesychasm names a way of prayer the Church has kept since the monks of the desert: withdrawing from distraction into stillness, so that the mind is gathered into the heart and turned wholly to God. Its prayer is the Jesus Prayer, "Lord Jesus Christ, Son of God, have mercy on me", repeated with attention until it is no longer only said but kept within.
In the fourteenth century the monks of Mount Athos who prayed this way were attacked by Barlaam of Calabria, who held to a more intellectual approach to prayer. St Gregory Palamas, asked by his fellow monks to answer him, taught that the light the saints behold in prayer is the uncreated light of God, the light of the Transfiguration. Councils in Constantinople between 1341 and 1351 upheld his teaching as the faith of the Orthodox Church.
The tradition's writings were gathered in the Philokalia, compiled by St Nikodemos of the Holy Mountain and St Makarios of Corinth and first published in Venice in 1782. Hesychasm is not a technique to be taken from a book. It is learned within the whole life of the Church, in repentance and the Mysteries, and under the guidance of an elder or spiritual father.

