The Heart of Christ! His "Sacred Heart" has given men everything: redemption, salvation, sanctification. St Faustina Kowalska saw coming from this Heart that was overflowing with generous love, two rays of light which illuminated the world. "The two rays", according to what Jesus himself told her, "represent the blood and the water" (Diary, p. 132). The blood recalls the sacrifice of Golgotha and the mystery of the Eucharist; the water, according to the rich symbolism of the Evangelist John, makes us think of Baptism and the Gift of the Holy Spirit (cf. Jn 3: 5; 4: 14).
Through the mystery of this wounded heart, the restorative tide of God's merciful love continues to spread over the men and women of our time. Here alone can those who long for true and lasting happiness find its secret.
POPE SAINT JOHN PAUL II, excerpt from the Homily for the First Celebration of Divine Mercy Sunday given on April 22, 2001