Prayer Before Mass Receive, O Holy Trinity, One God, this Holy Sacrifice of the Body and Blood of our Lord Jesus Christ, which I, Your unworthy servant, desire now to offer to Your Divine Majesty by the hands of this Your minister, with all the Sacrifices which have ever been or will be offered to You, in union with that most Holy Sacrifice offered by the same Christ our Lord at the Last Supper, and on the Altar of the Cross. I offer it to You with the utmost affection of devotion, out of pure love for Your infinite goodness, and according to the most holy intention of the same Christ our Lord, and of our Holy Mother the Church. O God, almighty and merciful, grant us through this Holy Sacrifice, joy and peace, a holier life, time to do penance, grace and consolation of the Holy Spirit, and perseverance in good works. Amen. Prayer of St. Ambrose (Before Mass) Lord Jesus Christ, I approach your banquet table in fear and trembling, for I am a sinner, and dare not rely on my own worth, but only on your goodness and mercy. I am defiled by many sins in body and soul, and by my unguarded thoughts and words. Gracious God of majesty and awe, I seek your protection, I look for your healing. Poor troubled sinner that I am, I appeal to you, the fountain of all mercy. I cannot bear your judgment, but I trust in your salvation. Lord, I show my wounds to you and uncover my shame before you. I know my sins are many and great, and they fill me with fear, but I hope in your mercies, for they cannot be numbered. Lord Jesus Christ, eternal king, God and man, crucified for mankind, look upon me with mercy and hear my prayer, for I trust in you. Have mercy on me, full of sorrow and sin, for the depth of your compassion never ends. Praise to you, saving sacrifice, offered on the wood of the cross for me and for all mankind. Praise to the noble and precious blood, flowing from the wounds of the my crucified Lord Jesus Christ and washing away the sins of the whole world. Remember, Lord your creature, whom you have redeemed with your blood; I repent my sins, and I long to put right what I have done. Merciful Father, take away all my offenses and sins; purify me in body and soul, and make me worthy to taste the holy of holies. May your body and blood, which I intend to receive, although I am unworthy, be for me the remission of my sins, the washing away of my guilt, the end of my evil thoughts, and the rebirth of my better instincts. May it incite me to do the works pleasing to you and profitable to my health in body and soul, and be a firm defense against the wiles of my enemies.