13 But how can these rites of expiation bring solace now, when Christ is already reigning in the beatitude of Heaven? To this we may answer in some words of St. Augustine which are very apposite here, - "Give me one who loves, and he will understand what I say" (In Johannis evangelium , tract. XXVI, 4). For any one who has great love of God, if he will look back through the tract of past time may dwell in meditation on Christ, and see Him laboring for man, sorrowing, suffering the greatest hardships, "for us men and for our salvation," well-nigh worn out with sadness, with anguish, nay "bruised for our sins" ( Isaias liii, 5), and healing us by His bruises. And the minds of the pious meditate on all these things the more truly, because the sins of men and their crimes committed in every age were the cause why Christ was delivered up to death, and now also they would of themselves bring death to Christ, joined with the same griefs and sorrows, since each several sin in its own way is held to renew the passion of Our Lord: "Crucifying again to themselves the Son of God, and making him a mockery" ( Hebrews vi, 6). Now if, because of our sins also which were as yet in the future, but were foreseen, the soul of Christ became sorrowful unto death, it cannot be doubted that then, too, already He derived somewhat of solace from our reparation, which was likewise foreseen, when "there appeared to Him an angel from heaven" ( Luke xxii, 43), in order that His Heart, oppressed with weariness and anguish, might find consolation. And so even now, in a wondrous yet true manner, we can and ought to console that Most Sacred Heart which is continually wounded by the sins of thankless men, since - as we also read in the sacred liturgy - Christ Himself, by the mouth of the Psalmist complains that He is forsaken by His friends: "My Heart hath expected reproach and misery, and I looked for one that would grieve together with me, but there was none: and for one that would comfort me, and I found none" ( Psalm lxviii, 21).
Source: Miserentissimus Redemptor (Vatican.va)