The Catholic Defender: O Blood and Water, which gushed forth from the Heart of Jesus as a fountain of Mercy for us, I trust in you!

This beautiful prayer is the core invocation of the Chaplet of Divine Mercy, revealed by Jesus to St. Faustina Kowalska in the 1930s. It reflects on the blood and water that flowed from Christ's pierced heart, symbolizing the sacraments of Baptism and the Eucharist. 

The complete prayer is often recited at 3:00 PM, known as the Hour of Great Mercy, or as part of the opening sequence of the Chaplet. The full Divine Mercy 3 O'Clock Prayer is as follows: 

"You expired, Jesus, but the source of life gushed forth for souls, and the ocean of mercy opened up for the whole world. O Fount of Life, unfathomable Divine Mercy, envelop the whole world and empty Yourself out upon us.

O Blood and Water, which gushed forth from the Heart of Jesus as a fountain of Mercy for us, I trust in you!"

"Jesus, I trust in You" is the foundational prayer of the Divine Mercy devotion, famously associated with St. Faustina Kowalska. It is a powerful act of surrender, asking to place your worries and faith entirely into His hands.

It stems from the visions of Saint Faustina in the 1930s, which emphasize surrendering to God’s mercy and trusting in His love.

The phrase serves as a complete act of abandonment, asking for peace and divine assistance during moments of anxiety, suffering, or doubt

The Old Testament (Hesed and Rahamim): The Hebrew word most frequently used for God's mercy is hesed, which translates to steadfast, covenant love. In Exodus 34:6, God reveals Himself as "a God merciful and gracious, slow to anger, and abounding in steadfast love and faithfulness." Another word, rahamim, reflects a deep, maternal compassion and is famously highlighted in Lamentations 3:22-23: "The steadfast love of the Lord never ceases, his mercies never come to an end; they are new every morning." 

The Heart of Jesus (The Gospels): Jesus Christ is the ultimate embodiment of Divine Mercy. He regularly emphasizes mercy over legalistic sacrifice (e.g., Matthew 9:13). Through parables like the Prodigal Son (Luke 15:11-32) and the Good Samaritan (Luke 10:25-37), Jesus portrays God as a relentlessly forgiving Father who seeks out the lost.

The Pierced Heart: The visual of the Divine Mercy image—with red and white rays representing blood and water—is rooted directly in John 19:34, where Jesus' side is pierced on the cross, "and at once there came out blood and water." In scripture, this outflow represents the Sacraments (Baptism and the Eucharist) and the cleansing flow of grace for humanity. 

The Call to Forgive: The message of Divine Mercy is heavily tied to human forgiveness. Jesus tells the Parable of the Unmerciful Servant in Matthew 18:21-35 and gives the mandate in Luke 6:36: "Be merciful, even as your Father is merciful." 

The Abundance of Grace: St. Paul summarizes the redemptive power of mercy in Ephesians 2:4-5, writing, "But God, being rich in mercy, because of the great love with which he loved us, even when we were dead in our trespasses, made us alive together with Christ."