There are many evangelicals today, especially apologists, who consider themselves Thomists, or those who follow the thinking of Thomas Aquinas. Of course, it is a significant source of information about Roman Catholic theology, but there will be much in it that Protestants can agree with regarding evidence for God’s existence, ethics, epistemology, faith and reason, and anthropology. The Summa Theologica is still in print and available today. A majority of the third section is devoted to explaining the sacraments. In the same section, Aquinas addresses the need for sacraments in the remission of sins. The third part instructs the reader on the doctrine of Christ including His incarnation, life, death, and resurrection. The second part addresses ethics, habits, law, faith, wisdom, self-control, morality, prophecy, miracles, and the contemplative life. The first part covers the nature of God, creation, angels, man, and divine government (sovereignty). The Summa Theologica is divided into three parts. The Summa Theologica was declared to be the official teaching of the Roman Catholic Church by Pope Leo XIII (1879). Aquinas, however, did reject Aristotle’s concept of a detached and distant God in favor of the God of the Bible who is intensely interested and knowable. Written from 1265-1273, the Summa Theologica (or Summa Theologiae, or sometimes referred to as the Summa) is the name of the philosophical summary ( summa) of the theology ( theologica) of the Roman Catholic Church as presented and organized by Thomas Aquinas, 1225-1274.Īquinas used Aristotelian philosophy as a framework for the Summa Theologica, believing Aristotle to be a friend of Christianity when many earlier thinkers had seen him as a foe.