As in the first two books of Summa Contra Gentiles, in Book Three St. Thomas continues to expound and defend the truths of the Catholic faith by means of reason and to judge other world views in the light of reason. He considers especially the end and purpose of creation and particularly the end of man and the providence of God over all things. Book Three has three main divisions-God as the end and good of all things; God's general government of things; providence and rational things. It is in this Book that the famous discussion of the end of man (including the section on man's desire for the vision of God) is found. Here, too, is St. Thomas' treatment of moral problems under the precepts and counsels of Divine Law. Unsurpassed in cogency and clarity, On The Truth of the Catholic Faith: Book III is a profound and penetrating discussion of the ways bf God to man. Its theme and culmination are best expressed in the language of the Apostle to the Gentiles: “For of Him, and by Him, and in Him, are all things: to Him be glory for ever”.