Nothing…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.
Since then the Heart of Christ is overflowing with love both human and divine and rich with the treasure of all graces which our Redeemer acquired by His life, sufferings and death, it is therefore the enduring source of that charity which His Spirit pours forth on all the members of His Mystical Body.
And so the Heart of our Savior reflects in some way the image of the divine Person of the Word and, at the same time, of His twofold nature, the human and the divine; in it we can consider not only the symbol but, in a sense, the summary of the whole mystery of our redemption.
When we adore the Sacred Heart of Jesus Christ, we adore in it and through it both the uncreated love of the divine Word and also its human love and its other emotions and virtues, since both loves moved our Redeemer to sacrifice Himself for us and for His Spouse, the Universal Church.
[…] Just as Christ loved the Church, so He still loves it most intensely with that threefold love of which We spoke, which moved Him as our Advocate “always living to make intercession for us” to win grace and mercy for us from His Father.
The prayers which are drawn from that unfailing love, and are directed to the Father, never cease.
As “in the days of His flesh,” so now victorious in heaven, He makes His petition to His heavenly Father with equal efficacy, to Him “Who so loved the world that He gave His only begotten Son, that whosoever believeth in Him may not perish, but may have life everlasting.”
He shows His living Heart, wounded as it were, and throbbing with a love yet more intense than when it was wounded in death by the Roman soldier’s lance: “Thy Heart has been wounded so that through the visible wound we may behold the invisible wound of love” (St Bonaventure).
It is beyond doubt, then, that His heavenly Father “Who spared not even His own Son, but delivered Him up for us all,” when appealed to with such loving urgency by so powerful an Advocate, will, through Him, send down on all men an abundance of divine graces.
Pius XII (1876-1958): Haurietis Aquas, 85-88.