The Summa Theologica is a compendium of theology written by Thomas Aquinas between 1265 and 1273. In Roman Catholicism it is the sum of all known learning and doctrine, of all that can be known about God and humanity’s relations with God — a landmark in the history of theology that famously offers five proofs of God’s existence, the first three of which are cosmological arguments; the fourth, a moral argument; and the fifth, a teleological argument.
The third quarter of the thirteenth century marked the first decisive philosophical encounter between Hellenism and Christianity. The rediscovery of Aristotle’s works after the Dark Ages ushered in a new era of intellectual fervor in Europe, and the work of Thomas Aquinas is a commentary on Aristotle, whose writings were lost to the non-Arabic world until the beginning of the Thirteenth Century. To many, Aristotle’s worldview was a pagan threat to Christianity. To Aquinas, it provided an exciting cosmol
