Today, October 5th, as our Church celebrates the optional Memorial of Saint Faustina Kowalska, Virgin, we are first invited to reflect on a passage from the letter of the apostle Paul to the Corinthians (4: 1-24), entitled "Christian Chastity". Our treasure, which follows, is from the degree on the renewal of religious life of the Second Vatican Council. Venerated as the "Apostle of Divine Mercy," Saint Maria Faustina Kowalska of the Blessed Sacrament was born in Głogowiec, Poland, on August 25, 1905. Beginning in 1924 and continuing throughout her life, Faustina reported having visions of Jesus and conversations with Him, which she recorded in her diary, later published as The Diary of Saint Maria Faustina Kowalska: Divine Mercy in My Soul. On February 22, 1931, Faustina had a vision of Jesus. She understood Jesus to be calling her to become the Apostle and Secretary of Divine Mercy, a model of mercy toward others, and an instrument for proclaiming God's plan of mercy for the world. Saint Faustina died on October 5, 1938, was beatified in 1993, and canonized in 2000, both by Pope Saint John Paul II. The Diary of Saint Maria Faustina Kowalska: Divine Mercy in My Soul is the spiritual journal of Faustina Kowalska (1905–1938), in which she recorded her prayer, struggles, spiritual experiences, and the messages about God's Divine Mercy that she believed Jesus entrusted to her. Its deepest message is simple: trust completely in Jesus, receive His mercy with a repentant heart, and allow that mercy to transform you into an instrument of mercy for others. The Devotion to the Divine Mercy of Jesus, is a way of responding to the Gospel truth that God's mercy is greater than our sins and that He desires every sinner to turn to Him with repentance, confidence, and trust. It is practiced particularly through venerating the Divine Mercy image with the words "Jesus, I trust in You," praying the Chaplet of Divine Mercy, observing the Hour of Mercy at 3:00 p.m., celebrating Divine Mercy Sunday. Its message is especially important today because a world burdened by sin, fear, division, suffering, and despair needs to hear that no one is beyond the reach of God's mercy; but the mercy we receive is also meant to transform us, making us more forgiving, compassionate, and merciful toward others. The primary message of St. Paul's first letter to the Corinthians is a call to unity, holiness, and mature Christian living rooted in the Cross of Christ. Saint Paul emphasizes that spiritual gifts exist not for self-exaltation but for the building up of the Church, with love as the supreme and indispensable virtue. Taken together, today's two readings teach that every Christian vocation calls for a heart that belongs first and completely to Christ. In our first reading from First Corinthians, Saint Paul teaches that Christian chastity, particularly consecrated virginity, can free a person from certain earthly concerns so as to serve the Lord with an undivided heart, while still affirming the goodness of marriage; in our "treasure" from Vatican II's degree on religious life, the Church explains that religious men and women embrace chastity, poverty, and obedience in order to follow Christ more closely and witness that He is their greatest treasure. Read on the memorial of Faustina Kowalska, these readings remind us that holiness is ultimately a total gift of ourselves to Christ: whatever our vocation, we are called to surrender our hearts to Him, trust in His mercy, become increasingly free from whatever competes with Him, and allow His love to transform us so that we can give ourselves more completely in love and mercy to others.