Summa Theologica - Part I Q79b-84a: Of the Intellectual Powers - How the Soul While United to the Body Understands Corporeal Things beneath It

The Summa Theologica (or the Summa Theologiae or simply the Summa, written 1265–1274) is the most famous work of Thomas Aquinas although it was never finished. It was intended as a manual for beginners as a compilation of all of the main theological teachings of that time. It summarizes the reasonings for almost all points of Christian theology in the West, which, before the Protestant Reformation, subsisted solely in the Roman Catholic Church. The Summa's topics follow a cycle: the existence of God, God's creation, Man, Man's purpose, Christ, the Sacraments, and back to God. (Summary adapted from the Wikipedia)

 79. Of the Intellectual Powers

 80. Of the Appetitive Powers in General

 81. Of the Power of Sensuality

 82. Of the Will

 83. Of Free-Will

 84. How the Soul While United to the Body Understands Corporeal Things beneath It