Devotion to the Heart of Jesus has its foundation and beginning in the Father's revelation of his love in Jesus Christ through the Holy Spirit.
Right from the first centuries, Christ's pierced Heart has been seen as a symbol of his unconditional love for all mankind. This tradition begins from the Gospel of John.
Streams of Living water (Jn 7:37-39)
During the Feast of the Tabernacles, when the Jews called to mind the miracle of the Exodus, when Moses had saved the people by making water flow from the rock (Exodus 17:1-7), "Jesus cried out:
Let anyone who is thirsty come to me.
Let anyone who believes in me come and drink.
As Scripture says: From his heart shall flow streams
of living water" (7:38).
In other words, from Christ’s heart God's Spirit will flow like living water from a fountain. As water brings new life to parched land, saving the crops and the people who depend on them, so Jesus, the new Moses, will bring salvation to his people.
The pierced side (Jn 19:34-37)
The prophecy about the streams of living water is fulfilled in the pierced Heart of Jesus.
"One of the soldiers pierced his side with a lance; and immediately there came out blood and water" (19:34).
The blood shows that the Lamb (Jesus) has truly been sacrificed for the salvation of the world, and the water, symbol of the Spirit, shows that the sacrifice is a rich source of the Father's life-giving love.
The Preface of the Mass of the Sacred Heart has a truly biblical inspiration when it proclaims:
"From his wounded side flowed blood and water,
the fountain of sacramental life in the Church.
To his open heart the Saviour invites all people
to draw water with joy from the springs of salvation".
The first centuries
The earliest reference to the mystery of Christ's Heart is found in the works of St. Irenaeus who died in 202. He wrote: "The Church is the source of living water which flows from the heart of Christ".
Many of the first great Christian teachers interpreted the water and blood as symbols of Baptism and the Eucharist, and these two sacraments as standing for the Church which is born from the side of the crucified Christ.
The Middle Ages
Throughout the first centuries devotion to the Heart of Jesus remained at one with the Bible and the Liturgy.
In the 12th century mention of the 'heart' grew more and more: it was a time when people were searching for the warmth and humanity of Jesus. The 'heart' called to mind the personal experience of Jesus, which implied feelings and emotions, with its emphasis on his humanity. In the Heart of Jesus the great mystics and saints saw the sign of the Word made flesh, the charity and love of God in human form.
Eventually, contemplation of the pierced Heart began to spread among ordinary people, thanks to the work of the Jesuits.
St. Margaret Mary Alacoque (1647-1690)
She entered the Visitation Convent of Paray-le-Monial in France in 1671, where she led a life of rapid progress along the way of perfection and was granted mystical revelations especially concerning the Heart of Jesus. In her visions she was told to encourage devotion to the Sacred Heart and to have a feast established in his honour.
She wrote:
I believe that the reason behind our Lord's great desire that special honour should be paid to his sacred heart is his wish to renew in our souls the effects or our redemption. For his sacred heart is an inexhaustible spring which has no other purpose than to overflow into hearts which arc humble, so that they may be ready and willing to devote their lives to his goodwill and pleasure.
Modern times
In 1856, the Feast of the Sacred Heart was extended to the whole Church, a sign that the devotion had spread widely.
Later, several Popes commended the devotion to the Church in their encyclical letters and expanded its doctrinal and scriptural foundations. In 1956, Pius XII issued an encyclical - Haurietis Aquas - where he reminded the faithful that the worship we render to the Sacred Heart is essentially a worship of adoration: we adore the glorious Heart of the Lord.
The Liturgy of the Solemnity of the Sacred heart does not stop with Jesus' human heart: it plunges us into the depths of love within the Trinity.
Father,
we have wounded the heart of Jesus, your Son,
but he brings us forgiveness and grace.
Help us to prove our grateful love
and make amends for our sins.