Bishop Robert Barron: Christianity and the Power of Reason

In 'Mere Christianity', C.S. Lewis argues for the existence of God and defends Christian theology. The book is divided into four parts: the first argues for the existence of God based on the 'law of human nature'; the second defends Christian theology, including the 'Liar, lunatic, or Lord' trilemma regarding Jesus Christ; the third explores Christian ethics, including the cardinal and theological virtues; and the fourth discusses the Christian conception of God, particularly the Holy Trinity. Lewis also addresses topics such as free will, morality, sexual ethics, and the institution of marriage. The book is known for its clear and logical presentation of Christian apologetics and has been praised for its straightforward and humorous writing style.

De Regno, or 'On Kingship,' by St. Thomas Aquinas, is a treatise on political philosophy and kingship. It offers guidance to rulers on governing justly and achieving the common good, blending Aristotelian political thought with Christian theology. Aquinas emphasizes the ruler's responsibility to promote both the temporal and spiritual well-being of their subjects, balancing material prosperity with spiritual growth. The work explores the relationship between earthly authority and divine providence, highlighting the importance of natural and divine law in governance. It remains a significant text in the history of political philosophy and Catholic social teaching.