Pope Pius XI, in the encyclical Miserentissimus Redemptor (May 7, 1928), gave the following command:
"...we decree and command that every year on the Feast of the Most Sacred Heart of Jesus, -- which feast indeed on this occasion we have ordered to be raised to the degree of a double of the first class with an octave -- in all churches throughout the whole world, the same expiatory prayer or protestation as it is called, to Our most loving Savior, set forth in the same words according to the copy subjoined to this letter shall be solemnly recited, so that all our faults may be washed away with tears, and reparation may be made for the violated rights of Christ the supreme King and Our most loving Lord."
The Holy See then proposed the following formula for the act of reparation, which is also covered by a plenary indulgence in the usual conditions (Ench. ind. 4. ed, aliae concessiones, 3):
Most sweet Jesus, whose overflowing charity for men is requited by so much forgetfulness, negligence and contempt, behold us prostrate before you, eager to repair by a special act of homage the cruel indifference and injuries to which your loving Heart is everywhere subject.Mindful, alas! that we ourselves have had a share in such great indignities, which we now deplore from the depths of our hearts, we humbly ask your pardon and declare our readiness to atone by voluntary expiation, not only for our own personal offenses, but also for the sins of those, who, straying far from the path of salvation, refuse in their obstinate infidelity to follow you, their Shepherd and Leader, or, renouncing the promises of their baptism, have cast off the sweet yoke of your law.We are now resolved to expiate each and every deplorable outrage committed against you; we are now determined to make amends for the manifold offenses against Christian modesty in unbecoming dress and behavior, for all the foul seductions laid to ensnare the feet of the innocent, for the frequent violations of Sundays and holy-days, and the shocking blasphemies uttered against you and your Saints. We wish also to make amends for the insults to which your Vicar on earth and your priests are subjected, for the profanation, by conscious neglect or terrible acts of sacrilege, of the very Sacrament of your divine love, and lastly for the public crimes of nations who resist the rights and teaching authority of the Church which you have founded.Would that we were able to wash away such abominations with our blood. We now offer, in reparation for these violations of your divine honor, the satisfaction you once made to your Eternal Father on the cross and which you continue to renew daily on our altars; we offer it in union with the acts of atonement of your Virgin Mother and all the Saints and of the pious faithful on earth; and we sincerely promise to make recompense, as far as we can with the help of your grace, for all neglect of your great love and for the sins we and others have committed in the past. Henceforth, we will live a life of unswerving faith, of purity of conduct, of perfect observance of the precepts of the Gospel and especially that of charity. We promise to the best of our power to prevent others from offending you and to bring as many as possible to follow you. O loving Jesus, through the intercession of the Blessed Virgin Mother, our model in reparation, deign to receive the voluntary offering we make of this act of expiation; and by the crowning gift of perseverance keep us faithful unto death in our duty and the allegiance we owe to you, so that we may all one day come to that happy home, where with the Father and the Holy Spirit you live and reign, God, forever and ever. Amen.
***IESU DULCISSIME, cuius effusa in homines caritas, tanta oblivione, negligentia, comtemptione, ingratissime rependitur, en nos, ante altaria tua provoluti, tam nefariam hominum socordiam iniuriasque, quibus undique amantissimum Cor tuum afficitur, peculiari honore resarcire contendimus.Attamen, memores tantae nos quoque indignitatis non expertes aliquando fuisse, indeque vehementissimo dolore commoti, tuam in primis misericordiam nobis imploramus, paratis, voluntaria expiatione compensare flagitia non modo quae ipsi patravimus, sed etiam illorum, qui, longe a salutis via aberrantes, vel te pastorem ducemque sectari detrectant, in sua infidelitate obstinati, vel baptismatis promissa conculcantes, suavissimum tuae legis iugum excusserunt.
Quae deploranda crimina, cum universa expiare contendimus, tum nobis singula resarcienda proponimus: vitae cultusque immodestiam atque turpitudines, tot corruptelae pedicas innocentium animis instructas, dies festos violatos, exsecranda in te tuosque Sanctos iactata maledicta atque in tuum Vicarium ordinemque sacerdotalem convicia irrogata, ipsum denique amoris divini Sacramentum, vel neglectum vel horrendis sacrilegiis profanatum, publica postremo nationum delicta, quae Ecclesiae a te institutae iuribus magisterioque reluctantur.Quae utinam crimina sanguine ipsi nostro eluere possemus! Interea ad violatum divinum honorem resarciendum, quam Tu olim Patri in Cruce satisfactionem obtulisti quamque quotidie in altaribus renovare pergis, hanc eamdem nos tibi praestamus, cum Virginis Matris, omnium Sanctorum, piorum quoque fidelium expiationibus coniunctam, ex animo spondentes, cum praeterita nostra aliorumque peccata ac tanti amoris incuriam firma fide, candidis vitae moribus, perfecta legis evangelicae, caritatis potissimum, observantia, quantum in nobis erit, gratia tua favente, nos esse compensaturos, tum iniurias tibi inferendas pro viribus prohibituros, et quam plurimos potuerimus ad tui sequelam convocaturos. Excipias, quaesumus, benignissime Iesu, beata Virgine Maria Reparatrice intercedente, voluntarium huius expiationis obsequium nosque in officio tuique servito fidissimos ad mortem usque velis, magno illo perseverantiae munere, continere, ut ad illam tandem patriam perveniamus omnes, ubi Tu cum Patre et Spiritu Sancto vivis et regnas in saecula saeculorum. Amen.
As indicated in the encyclical of Pope Pius XI, the public praying of this Act should be celebrated with solemnity. All Catholic communities, especially those that are dedicated to the restoration of the sacred and the celebration of the liturgy according to the mind of the Church would do well not to neglect this opportunity to render yet another act of homage and reparation to Our Lord, who is already much offended by our sins.
