The Doctrine of Predestination (Introduction to Theology Lesson 8)

Proslogion is a philosophical and theological work by Anselm of Canterbury, written in the late 11th century. The central theme of Proslogion is the existence and nature of God, which Anselm explores through reason and logic. He introduces his famous ontological argument for God's existence, asserting that the very concept of God as the greatest conceivable being implies his actual existence. Anselm's argument starts with the idea that even those who deny God's existence have an understanding of what God means. Anselm posits that something that exists both in understanding and in reality is greater than something that exists only in understanding. Therefore, if God exists only in understanding, it would be possible to conceive of something greater, which contradicts the initial definition of God as the greatest conceivable being.

Martin Luther's "Bondage of the Will" is a theological treatise defending his doctrine of justification by faith alone against the views of Erasmus of Rotterdam.