The Jesus prayer heals from anxiety and fear
 																														 I wandered for a long time and I walked for three days, without  seeing a single village. In the meantime, my dried bread was almost gone  and I began to be very much afraid that I might die of hunger in this  wilderness. I started to pray intensely with the Jesus Prayer (Lord  Jesus Christ, have mercy on me) from the depths of my heart and all my  fears vanished because I placed all my hope in God. The peace of my mind  returned and I was again in good spirits.
 From The Way of the Pilgrim