Act of Consecration of the Human Race to the Sacred Heart of Jesus By Pope Leo XIII

Most sweet Jesus, redeemer of the human race, look down upon us, humbly prostrate before your altar. We are yours and yours we wish to be; but to be more surely united with you, behold each one of us freely consecrates himself today to your most sacred heart. Many, indeed, have never known you, many too, despising your precepts, have rejected you. Have mercy on them all, most merciful Jesus, and draw them to your sacred heart. Be you king, O Lord, not only of the faithful who have never forsaken you, but also of the prodigal children who have abandoned you; grant that they may quickly return to their father’s house, lest they die of wretchedness and hunger. Be you king of those who are deceived by erroneous opinions, or whom discord keeps aloof, and call them back to the harbor of truth and unity of faith, so that soon there may be but one flock and one shepherd. Be you king also of all those who sit in the ancient superstition of the Gentiles, and refuse not you to deliver them out of darkness into the light and kingdom of God. Grant, O Lord, to your Church, assurance of freedom and immunity from harm; give peace and order to all nations, and make the earth resound from pole to pole with one cry: Praise to the divine heart that wrought our salvation; to it be glory and honor forever.

(Encyclical Letter Annum Sacrum, 25 May 1899)

Act of Consecration (Composed by St. Margaret Mary)

Act of Consecration to the Sacred Heart

O Sacred Heart of Jesus, to Thee I consecrate and offer up my person and my life, my actions, trials, and sufferings, that my entire being may henceforth only be employed in loving, honoring and glorifying Thee. This is my irrevocable will, to belong entirely to Thee, and to do all for Thy love, renouncing with my whole heart all that can displease Thee.

I take Thee, O Sacred Heart, for the sole object of my love, the protection of my life, the pledge of my salvation, the remedy of my frailty and inconstancy, the reparation for all the defects of my life, and my secure refuge at the hour of my death. Be Thou, O Most Merciful Heart, my justification before God Thy Father, and screen me from His anger which I have so justly merited. I fear all from my own weakness and malice, but placing my entire confidence in Thee, O Heart of Love, I hope all from Thine infinite Goodness. Annihilate in me all that can displease or resist Thee. Imprint Thy pure love so deeply in my heart that I may never forget Thee or be separated from Thee.
I beseech Thee, through Thine infinite Goodness, grant that my name be engraved upon Thy Heart, for in this I place all my happiness and all my glory, to live and to die as one of Thy devoted servants.

Amen.

(by St. Margaret Mary Alacoque found in the book
Devotion To The Sacred Heart
by Fr. John Croiset, S.J.)

Final Act of Consecration (Composed by St. Margaret Mary)

O Jesus, Infinite love, I wish to consecrate myself to Thee with all the fever of my soul. I offer Thee all my being on the alter of Thy Heart where Thou dost sacrifice Thyself for love of me. I offer Thee my body which I will respect because it is the temple in which Thou dwells; my soul, which I will cultivate as a garden where Thou mayest come to take Thy rest; my senses, which I will guard because they are the door which the tempter comes in; the powers of my soul, which I will open to the inspirations of grace; my thoughts, which will no longer fasten themselves on worldly illusions, my desires , which will reach towards the happiness of Heaven; my virtues, with will flourish under the shadow of Thy protection; my passions, which I will submit to the yoke of Thy commandments; may very sins, and which I will detest as long as my heart is capable of hatred and which I will unceasingly weep over as long as I have tears to weep. From today on my heart wishes to be all Thine, forever, without fault or lukewarmness as Thou, divine Heart, willed to be all mine. I will serve Thee for sacrifice myself for all those who blaspheme Thee. Thou know the sincerity of my desires, according me the grace which in the battles of life, and place on my brow, one day , an immortal crown in the dwellings of Thy glory. Thou wilt be my reward, and the Wound in Thy most lovable Heart will be my eternal Paradise. Thy Kingdom come!

St. Margaret Mary found in the book 20 Holy Hours by Fr. Mateo Crawley Boevey, SS.CC.