St. Thomas Aquinas, who was canonized in 1323 and proclaimed a Doctor of the Universal Church in 1567, created works that have been pivotal in the development of Catholic theology over the last 750 years. Drawing from his vast understanding of the Sacred Scriptures, Aristotelian logic, and the works of earlier Church Fathers (such as St. Augustine and St. Gregory), St. Thomas set forth in writing the first true compendium of the essential truths of the Catholic Faith. Even today, the understanding of the Catholic Faith has changed little from what was written by St. Thomas.

In St. Thomas's writings, his keen intellect is readily apparent, as is his deep yet humble faith. St. Thomas includes extensive references to the Sacred Scriptures as well as references to the writings of early theologians and philosophers. These references allow the reader to explore deeper into the Faith. You will notice that St. Thomas often refers to "the Philosopher" and "the Apostle." These references are to Aristotle and St. Paul, respectively.