This masterpiece reveals the secret of God’s presence in human action and how we can cooperate in allowing God to lovingly shape our hearts so that we can produce fruit that will last. Fr. Wojciech Giertych, O.P., the theologian of the Papal Household, offers a uniquely insightful exploration of how divine grace works within human actions, elevating them to a supernatural level. Through the prism of the teachings of St. Thomas Aquinas, Pope St. John Paul II, St. Thérèse of Lisieux, and Bl. Marie-Eugène of the Child Jesus, among others, Fr. Giertych examines the often untapped divine grace we receive at Baptism. With fresh insights, he unpacks the foundations of moral theology in a relational way, asking, “How can God’s love meet man?” Although the pursuit of sanctity may seem as if it is reserved for a chosen few, Father reminds us that the call to holiness is for all the baptized of the Church. The world is transformed by saints, he explains, so whether you are an educator, formator, student, or layman, strive to deepen your trust in God and build greater intimacy with Him, pursuing sanctity will enable you to manifest the divine power He is bestowing. In these power-packed pages, which delve into philosophy and psychology, you will discover ways in which the mystery of God’s grace is revealed in human freedom. You will be encouraged as you find: The foremost means to grow in the spiritual life and three means necessary for blossoming virtues - The nature of conscience, and counsel on developing maturity in conscience - Examples of why modern Catholic moral theology falls short (You will be surprised!) - How to determine the morality of an act, according to St. Thomas Aquinas - Ways God invites us to participate in His inner life so that your yes will bear fruit - The role of integrating emotions in your life, and two cures for overcoming neurosis How to Live by Grace will enrich your understanding and practice of living a grace-filled life. It will open your heart to the Holy Spirit, make plain the relationship between faith and reason, and enable you to enjoy the happiness that the heart of God the Father wishes for you.    Fr. Wojciech Giertych, O.P., is a Polish Roman Catholic priest in the Dominican Order. He served in the Prefecture of the Pontifical Household as Theologian of the Pontifical Household during the pontificates of Pope Benedict XVI, Pope Francis, and now Pope Leo. Fr. Giertych is also a consultor of the Dicastery for the Doctrine of the Faith, a consultor of the Dicastery for Causes of Saints, a member of the Pontifical Committee for Eucharistic Congresses, the Pontifical Academy of St. Thomas Aquinas, and the Pontifical Academy of Theology. He is the author of several books, including The Spark of Faith, The Mystery of Divine Love, and How to Live by Grace: Divine Fruitfulness in Human ActionIn the mid-1980s, Fr. Giertych was a formator of Dominican friars in Kraków as the assistant Student Master and, from 1990 to 1994, as the Student Master. Beginning in 1984, he was also a professor of moral theology in the Dominican House of Studies in Kraków. In