‘I prostrate myself, Lord, at the throne of Your majesty, I who am dust and ashes and the dregs of humanity. A thousand upon thousands of angels and countless legions of seraphim offer You, the holy Nature hidden from the senses and knowledge of all created beings, spiritual worship in the hiddenness of their natures with their fiery praises and their holy impulses; for You are close at hand, Lord, with Your assistance to everyone at all times of need, and Your door is open in season and out of season for the entreaties of all. You do not abhor sinners nor does Your Majesty feel loathing for the souls which are stained with all kinds of sins; rather, You draw up everyone from endless evils, including me, Lord, who am utterly defiled, seeing that You have held me worthy to fall down before You on my face and make bold to pronounce Your holy name with my mouth, even though I am a vessel full of uncleanness and not worthy to be numbered among the children of Adam.
‘Grant me, Lord, that I may be made holy by praising You, and be made pure by the remembrance of You; renew my life with a transformation of mind and with beneficial thoughts which You, in Your grace, stir within me. Be a guide to my mind in my meditation on You, and make me forget my stumbling conduct through a renewal of mind which You instill in me. Stir up within me requests that are beneficial, with my will in accordance with Your will, for it is You who give prayer to those who pray. Imprint in me a single will, one which gazes towards You at all times, and a deliberation which is never weakened in its hope of You by continual deaths for Your sake. Grant, Lord, that I do not pray before You with unfeeling words (just uttered) with the lips, but may I spread prostrate on the ground in hidden humility of heart and repentance of mind.’
St. Isaac the Syrian, in The Second Part, ed. and trans. by Sebastian Brock (CSCO Vol. 555)