At the beginning of the seventeenth century several regents of the College of St. Thomas were involved in controversies over the nature of divine grace. Diego Alvarez (1550 c.-1635), author of the "De auxiliis divinae gratiae et humani arbitrii viribus" and famous apologist for the Thomistic doctrines of grace and predestination, was professor of theology at the College from 1596 to 1606. Tomas de Lemos (Ribadavia 1540 - Rome 1629). was professor of theology at the College in 1610. In the Molinist controversy between Dominicans and Jesuits the papal commission or Congregatio de Auxiliis summoned Lemos and Diego Alvarez to represent the Dominican Order in debates before Pope Clement VIII and Pope Paul V. Lemos was editor of the "Acta omnium congregationum ac disputationum, etc." and author of the much discussed "Panoplia gratiae" (1676). In 1608 Juan Gonzalez de Albelda, author of the "Commentariorum & disputationum in primam partem Summa S. Thome de Aquino" (1621) was regent of studies at the College. In the 1620s Juan Gonzales de Leon was regent Concerning the dispute on the nature of divine grace he took up an alternative doctrine within the Thomist school, that of Juan Gonzalez d'Albeda regent at the College in 1608, that "sufficient grace not only prepares the will for a perfect act contrition, but also gives the will an impulse towards that act. Yet due to man's defectability that impulse is always resisted."