Way of Ascetics; Tito Colliander Chapter Twenty-Five: ON THE JESUS PRAYER

...  Especially should the beginner beware of everything that has the slightest tendency to mysticism. The Jesus Prayer is an activity, a practical work and a means by which you enable yourself to receive and use the power called God's grace-constantly present, however hidden, within the baptized person-in order that it may bear fruit. Prayer fructifies this power in our soul; it has no other purpose. It is a hammer that crushes a shell: a hammer is hard and its stroke hurts. Abandon every thought of pleasantness, rapture, heavenly voices: there is only one way to the kingdom of God, and that is the way of the Cross. And to hang crucified on a tree is horrible torment. Expect nothing else.  ...

Recorded at Christ the Savior in Anderson SC.