(This article courtesy of the Arlington Catholic Herald.)
Actually, your answer “hits the nail on the head.” The Catechism, quoting Pope Pius XII's beautiful encyclical Haurietis Aquas (1956), states, “[Jesus] has loved us all with a human heart. For this reason, the Sacred Heart of Jesus, pierced by our sins and for our salvation, 'is quite rightly considered the chief sign and symbol of that… love with which the divine Redeemer continually loves the eternal Father and all human beings’ without exception” (no. 478).
To appreciate this rich symbolism of the heart, we must remember in Judaism that the word heart represented the core of the person. While recognized as the principle life organ, the heart was also considered the center of all spiritual activity. Here was the seat of all emotion, especially love. As the psalms express, God speaks to a person in his heart and there probes him. This notion of the heart is clear when we read the words of Deuteronomy 6:5-6: “Therefore, you shall love the Lord, your God, with all your heart, and with all your soul, and with all your strength. Take to heart these words which I enjoin on you today.”
The heart has even greater depth when contemplated in light of the incarnation. We believe that Jesus Christ, second person of the Holy Trinity and consubstantial with the Father, entered this world taking on our human flesh — true God became also true man. While Jesus' heart obviously served a physiological function, spiritually His sacred heart also represents love: the divine love our Lord shares with the Father and Holy Spirit in the Trinity; the perfect, divine love which God has for us; and the genuine human love Christ felt in His human nature. I think one of the most beautiful passages of the Gospels is our Lord saying, “Come to me, all you who are weary and find life burdensome, and I will refresh you. Take my yoke upon your shoulders and learn from me, for I am gentle and humble of heart. Your souls will find rest, for my yoke is easy and my burden light” (Mt 11:28-30). Therefore, while meditating on the Sacred Heart of Jesus, we are called to share in the love of the Lord and strive to express our own genuine love for God, ourselves, and our neighbors.
Throughout the gospel, we see the outpouring of Jesus' love from His heart, whether in the miracle stories, the reconciliation of sinners, or the compassion for the grieving. Even on the cross, our Lord poured out His love for us: there the soldier's lance pierced His side and out flowed blood and water (Jn 19:34). St. Bonaventure said the Church was born from the wounded side of the Lord with the blood and water representing the Sacraments of the Holy Eucharist and Baptism.
The early Church Fathers clearly cherished this meaning of the Sacred Heart of our Lord. St. Justin Martyr (d. 165), in his Dialogue with the Jew Trypho said, “We Christians are the true Israel which springs from Christ, for we are carved out of His heart as from a rock.” Likewise, St. Irenaeus of Lyons (d. 202) said, “The Church is the fountain of the living water that flows to us from the Heart of Christ” (Adversus Haereses). Paulinus of Nola (d. 431) added, “John, who rested blissfully on the breast of our Lord, was inebriated with the Holy Spirit, from the Heart of all creating Wisdom he quaffed an understanding which transcends that of any creature.” Although these are just a few brief examples from the times of the early Church, we find a profound respect for the Sacred Heart of our Lord as a font of His love which gave birth to the Church and continues to nourish its members.
The devotion continued to grow during the Middles Ages, and in 1353 Pope Innocent VI instituted a Mass honoring the mystery of the Sacred Heart. During the age of the Protestant movement, devotion to the Sacred Heart was practiced in hope of restoring peace to a world shattered by political and religious persecution.
Shortly thereafter, the devotion escalated due to the fervor surrounding the apparitions of Our Lord to St. Margaret Mary Alacoque (1647-90). For example, on December 27, 1673, Our Lord revealed, “My Divine Heart is so passionately inflamed with love … that, not being able any longer to contain within Itself the flames of Its ardent charity, It must let them spread abroad through your means, and manifest Itself to man, that they may be enriched with Its precious treasures which I unfold to you, and which contain the sanctifying and salutary graces that are necessary to hold them back from the abyss of ruin.” The four apparitions provided the catalyst for the promotion of the devotion to the Sacred Heart: a feast day in honor of the Sacred Heart and the offering of Our Lord's saving grace and friendship if the individual attended Mass and received Holy Communion on nine consecutive first Fridays of the month.
In 1899, Pope Leo XIII consecrated the world to the Sacred Heart of Jesus. Since then, his successors have exhorted the faithful to turn to the Sacred Heart and make acts of personal consecration. They have also begged the faithful to offer prayers and penances to the Sacred Heart in reparation for the many sins of the world. Considering our present day and age, the temptations and sins of this world, the growing apathy and secularism and the awful scandal that has erupted in our Church, we too should turn again in loving devotion to the Sacred Heart of Jesus and ask Him to pour forth His grace.
Let us pray during this month of June, honoring the Sacred Heart of Jesus: First, let us pray for the grace of healing for those who have been the victims of sexual abuse by bishops and priests; may the Church express its sorrow and seek forgiveness from these victims, and may they in turn have the grace to forgive. Second, let us pray for the grace of courage for our bishops to be true shepherds in caring for their flocks, to reform the seminaries and vocations offices under their care, to restore discipline in clerical and religious life and to end the dissent that has undermined the Magisterium. Third, let us pray for the grace of perseverance, that clergy and laity alike will keep the Faith and not lose hope in this difficult time of purification.
In all, we must strive to make our hearts like His own, for Christ said, “Blessed are the pure of heart, for they shall see God” (Matthew 5:8). May we remember the words of the Preface of the Mass in honor of the Sacred Heart of Jesus: “Lifted high on the Cross, Christ gave His life for us, so much did He love us. From His wounded side flowed blood and water, the fountain of sacramental life in the Church. To His open heart the Savior invites all men, to draw water in joy from the springs of salvation.”