Delusion and the Jesus Prayer
by Scott D. Hendricks
Insanity can come from the Jesus Prayer only if people, while practising it, fail to renounce the sins and wicked habits which their conscience condemns. This causes a sharp inner conflict which robs the heart of all peace. As a result the brain grows confused and a man’s ideas become entangled and disorderly.
~ St. Theophan the Recluse
E. Kadloubovsky and G. E. H. Palmer, trans., The Art of Prayer: An Orthodox Anthology compiled by Igumen Chariton of Valamo, (New York: Faber and Faber, 1997), 270.