In the text of The Life of Our Memorable Father Joseph the Hesychast you will find the following extract giving a glimpse of his experience derived from the Jesus prayer and in general from leading a life of tranquil hesychasm:
There comes a moment when man is at prayer uttering it with all his noetic powers concentrated and with only the sweet Name of our Lord Jesus on his lips that all of a sudden his nous is illuminated or rather overwhelmed by a dazzling immaterial light as white as snow and a fine perfume imbues all his being. He emerges from himself standing in another world quite transformed. It is then that he neither prays nor thinks: he just looks upon the sublime works of God”.
Saint Makarios the Great had once said that “there are eyes behind these eyes and there is a hearing beyond this hearing.”
My humble hesychast Elder had two touching characteristic features: silence and tears. In the vastness of silence he could hear the whispers of grace. Death found him with his face bedewed with those tears whose sweetness we have not as yet experienced.
—Elder Ephraim of Arizona