This devotion has been present in the Church from its beginning. To venerate the Heart of Christ is to adore the Second Person of the Godhead, who offered us His pierced Heart when He offered up His life to the Father. On the night He was betrayed, St. John rested his head on His breast and listened to His beating Heart. This, we may say, is the first recorded act of the Devotion to the Sacred Heart. Like St. John, we are to listen attentively to the mysteries hidden in the Heart of Jesus, true God and true man.