Lord Jesus Christ, whose will all things obey: pardon what I have done and grant that I, a sinner, may sin no more. Lord, I believe that though I do not deserve it, you can cleanse me from all my sins. Lord, I know that man looks upon the face, but you see the heart. Send your Spirit into my inmost being, to take possession of my soul and body. Without you I cannot be saved; with you to protect me, I long for your salvation. And now I ask you for wisdom, deign of your great goodness to help and defend me. Guide my heart, almighty God, that I may remember your presence day and night.
From: The Desert of the Heart: Daily Readings with the Desert Fathers ed. Benedicta Ward SLG, Darton Longman & Todd, 1988. (Now out of print, but you can usually find second-hand copies on Amazon for around £5)