"Lord Jesus Christ, Son of God, have mercy on me, a sinner."
The Jesus Prayer is an ancient prayer, going back to Diadochos in the late fifth or early sixth century. It is an example of an "arrow prayer" (to "assault" heaven), a practice going back to monks in fourth century Egypt in Nitria. The prayer is a way of opening our hearts to God, a way we can, as St. Paul urges us, "pray ceaselessly," Repetition of the prayer can lead to an inner silence, called hesychia.
We explored the Jesus Prayer in presentations on July 2, 2006 and May 3, 2015, based on an audio CD of a lecture on the Jesus Prayer by Dr. Albert Rossi. The original presentation was tied to audio clips from the CD; these audio clips are not available in the download version. The presentation was by David Monyak.
The Jesus Prayer (audio CD), Albert Rossi, St. Vladimir's Orthodox Seminary Press, ISBN 0-88141-291-0
The Jesus Prayer, Lev Gillet, St. Vladimir's Orthodox Seminary Press, ISBN 0-88141-013-6
Saying the Jesus Prayer, Albert Rossi, web page at St. Vladimir Orthodox Theological Seminary