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In page Hesychasm:

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The goal at this stage is a practice of the Jesus Prayer with the mind in the heart, which practice is free of images (see Pros Theodoulon). By the exercise of sobriety (the mental ascesis against tempting thoughts), the hesychast arrives at a continual practice of the Jesus Prayer with his mind in his heart and where his consciousness is no longer encumbered by the spontaneous inception of images: his mind has a certain stillness and emptiness that is punctuated only by the eternal repetition of the Jesus Prayer.[citation needed]