As a child, Margaret Mary Alacoque had a heart that yearned for God, especially drawn to the Blessed Sacrament. She preferred quiet prayer to boisterous games, her soul already seeking a deeper connection. When she was eight years old, her father passed away, leaving her family to face financial hardship. A dispute over her family's property caused additional suffering for Margaret and her mother. Around the age of ten, rheumatic fever left her confined to her bed, unable to use her arms or legs for nearly four years. It was during these lonely days and nights that prayer became her constant companion. During this illness, Margaret made a solemn promise to the Blessed Virgin Mary: if she were healed, she would consecrate herself to a religious life. Miraculously, she was instantly restored to health. After her recovery, however, the world's allure distracted Margaret from her vow. She found herself caught up in the social whirl, dancing at balls and even contemplating marriage. But one night, returning home from a dance, she had a powerful vision of Jesus, scourged and suffering. This image pierced her heart, reminding her of her forgotten vow and her desire to dedicate her life to Him. At the age of 22, Margaret entered the Order of the Visitation nuns at Paray-le-Monial, in France. It was there that her life was transformed. Jesus appeared to her, revealing his Sacred Heart as a symbol of his boundless love for humanity. He spoke to her of his yearning for a return of that love, expressed through devotion and prayer. He entrusted her with the mission of spreading this devotion throughout the Church, despite the skepticism and criticism she initially faced from some within her community. Margaret Mary embraced her calling, tirelessly promoting the devotion to the Sacred Heart, encouraging the faithful to embrace its promises, including the practice of receiving Holy Communion on the first Friday of each month and observing a Holy Hour of prayer on Thursday nights. Through her trials, her unwavering faith never failed. Through her perseverance and the grace of God, devotion to the Sacred Heart of Jesus spread throughout France and eventually the entire world, recognized and approved by popes and becoming a cornerstone of Catholic spirituality. Margaret Mary Alacoque, the humble nun who was chosen by Christ to reveal the depths of his merciful love, died on October 17, 1690, with the name of Jesus on her lips. She was canonized a saint in 1920.