This is a beautiful prayer to be said while beginning adoration of the Most Holy Sacrament. It is from the book “Visits to the Most Blessed Sacrament” by St. Alphonsus Maria de Liguori, Bishop, Confessor, and Doctor of the Church. St Alphonsus is also the founder of the Congregation of the Most Holy Redeemer.
My Lord Jesus Christ, who, through the love which Thou didst bear to men, dost remain with them day and night in this sacrament, full of mercy and of love, expecting, inviting, and receiving all those who come to visit Thee, I believe that Thou art present in the Sacrament of the Altar.
From the abyss of my nothingness, I adore Thee, and I thank Thee for all the favors Thou hast bestowed upon me, particularly for having given me thyself in this sacrament, for having given me for my advocate Thy most holy Mother, Mary, and for having called me to visit Thee in this church.
I, this day, salute Thy most loving heart, and I intend to salute it for three ends; first, in thanksgiving for this great gift; secondly, in compensation for all the injuries Thou hast received from Thy enemies in this sacrament; thirdly, I intend, by this visit, to adore Thee in all places in which thou art least honored and most abandoned in the Holy Sacrament.
My Jesus, I love Thee with my whole heart. I am sorry for hitherto having offended Thy infinite goodness. I purpose, with the assistance of Thy grace, never more to offend Thee; and, at this moment, miserable as I am, I consecrate my whole being to Thee. I give thee my entire will, all my affections and desires, and all that I have. From this day forward do what Thou pleasest with me, and with whatever belongs to me. I only ask and desire Thy holy love, the gift of final perseverance, and the perfect accomplishment of Thy will.
I recommend to Thee the souls in purgatory, particularly those who were most devoted to the Blessed Sacrament and to the most holy Mary, and I also recommend to Thee all poor sinners.
Finally my dear Savior, I unite all my affections with the affection of Thy most loving heart; and thus united, I offer them to Thy eternal father, and I entreat Him in Thy name, and for Thy sake, to accept them. Amen.