A commentary on St. Thomas' Theological Summa, Ia, q. 27-119 written by renowned 20th century theologian, Fr. Reginald Garrigou-Lagrange, O.P.R#65533;ginald Marie Garrigou-Lagrange, O.P. (February 21, 1877, Auch, France - February 15, 1964, Rome) was a Catholic theologian and, among Thomists of the scholastic tradition, is generally thought to be the greatest Catholic Thomist of the 20th century. Outside the ranks of Thomists of that sort, his reputation is somewhat more mixed. He taught at the Pontifical University of St. Thomas Aquinas, commonly known as the Angelicum, in Rome from 1909 to 1960.Father Garrigou-Lagrange initially attracted attention when he wrote against the theological movement later called Modernism. He is also said to be the drafter or "ghostwriter" of Pope Pius XII's 1950 encyclical Humani Generis, subtitled "Concerning Some False Opinions Threatening to Undermine the Foundations of Catholic Doctrine."He is best known for his spiritual theology. His magnum opus in the field is The Three Ages of the Interior Life, in which he propounded the thesis that infused contemplation and the resulting mystical life are in the normal way of holiness of Christian perfection. This influenced the section entitled "Chapter V: The Universal Call to Holiness in the Church" in the Second Vatican Council's Dogmatic Constitution on the Church, Lumen Gentium.He taught many eminent Catholic theologians during his academic career, the most illustrious being the future Pope John Paul II, of whom he said "Writes much; says little." He is also known to have introduced Thomism to fellow theologian and priest Yves Congar, an expert on historical theology who became a Cardinal.