"You shall draw waters with joy out of the Savior's fountain."
This is beautiful scripture passage Pope Pius XII uses to open his encyclical on the Sacred Heart of Jesus. Haurietis Aquas (You shall draw waters) - the Latin title - was published on May 15, 1956 in honor of the 100th Anniversary of the establishment of the Feast of the Sacred Heart by Pope Pius IX.
In this profound encyclical, the Holy Father Pius XII refutes various arguments against devotion to the Sacred Heart and explores both the Old and New Testament as grounds for this devotion. He also expounds upon what such a devotion means for our spiritual life, that devotion to the Heart of Jesus is to love the heart of God.
On this feast of such splendor, various paragraphs/quotes are pasted below as a summary of this great document with hopes the Holy Father's words may invoke prayerful consideration, contemplation, and immense love toward the Sacred Heart of Jesus.
22. The other reason ... arises from the fact that His Heart, more than all the other members of His body, is the natural sign and symbol of His boundless love for the human race. "There is in the Sacred Heart," as Our predecessor of immortal memory, Leo XIII, pointed out, "the symbol and express image of the infinite love of Jesus Christ which moves us to love in return."
60. [W]e ought to meditate most lovingly on the beating of His Sacred Heart by which He seemed, as it were, to measure the time of His sojourn on earth until that final moment when, as the Evangelists testify, "crying out with a loud voice 'It is finished.', and bowing His Head, He yielded up the ghost." Then it was that His heart ceased to beat and His sensible love was interrupted until the time when, triumphing over death, He rose from the tomb.
71. It can therefore be declared that the divine Eucharist, both the sacrament which He gives to men and the sacrifice in which He unceasingly offers Himself from the rising of the sun till the going down thereof," and likewise the priesthood, are indeed gifts of the Sacred Heart of Jesus.
76. Under the influence of this love, our Savior, by the outpouring of His blood, became wedded to His Church: "By love, He allowed Himself to be espoused to His Church." Hence, from the wounded Heart of the Redeemer was born the Church, the dispenser of the Blood of the Redemption--whence flows that plentiful stream of Sacramental grace from which the children of the Church drink of eternal life, as we read in the sacred liturgy: "From the pierced Heart, the Church, the Bride of Christ, is born....And He pours forth grace from His Heart."
85. Nothing therefore prevents our adoring the Sacred Heart of Jesus Christ as having a part in and being the natural and expressive symbol of the abiding love with which the divine Redeemer is still on fire for mankind. Though it is no longer subject to the varying emotions of this mortal life, yet it lives and beats and is united inseparably with the Person of the divine Word and, in Him and through Him, with the divine Will ...
97. Consequently, it is clear that the revelations made to St. Margaret Mary brought nothing new into Catholic doctrine. Their importance lay in this that Christ Our Lord, exposing His Sacred Heart, wished in a quite extraordinary way to invite the minds of men to a contemplation of, and a devotion to, the mystery of God's merciful love for the human race. In this special manifestation Christ pointed to His Heart, with definite and repeated words, as the symbol by which men should be attracted to a knowledge and recognition of His love; and at the same time He established it as a sign or pledge of mercy and grace for the needs of the Church of our times.
Most Sacred Heart of Jesus, have mercy on us!