This book offers a detailed and updated presentation and defense of five of the historically most important, yet largely neglected in recent years, philosophical proofs for the existence of God: the Aristotelian, Neoplatonic, Augustinian, Thomistic, and Rationalist proofs. It also provides a thorough treatment of all important divine attributes - unity, simplicity, eternity, omnipotence, omniscience, perfect goodness, etc. - and demonstrates that God, whose existence is proven by these arguments, must possess these qualities. Finally, the book extensively addresses all objections that have been raised against these proofs. This work presents the most ambitious and comprehensive defense of traditional natural theology currently in print.