The Online Library of Liberty

A project of Liberty Fund, Inc.

• Introduction.
• The Truth of Faith Manifested By the Triumph of the Cross.
• Book I.
• Prologue.
• Chapter I.: How By Means of Visible Things We Arrive At the Knowledge of Such As Are Invisible.
• Chapter II.: How the Triumph of Christ Testifies to the Truth of Our Faith.
• Chapter III.: Containing Certain Fundamental and Irrefragable Principles.
• Chapter IV.: Answers to the Objections Which May Be Brought Against the Foregoing Propositions.
• Chapter V.: The Mode In Which Our Argument Must Be Conducted.
• Chapter VI.: The Existence of God.
• Chapter VII.: God Is Not a Body, Nor the Form of a Body, Nor Is He a Complex Substance.
• Chapter VIII.: God Is the Perfect and Supreme Good, and Is of Infinite Power; He Is In Every Place; and He Is Immutable and Eternal.
• Chapter IX.: God Is One.
• Chapter X.: God Knows All Things Perfectly, and Acts of His Own Will, and Not From Natural Necessity.
• Chapter XI.: The Providence of God Extends Over All Things.
• Chapter XII.: The End to Which Man Is Guided By Divine Providence.
• Chapter XIII.: Man’s Last End Cannot Be Attained In This Present Life.
• Chapter XIV.: The Soul of Man Is Immortal.
• Book II.
• Method Observed Throughout This Book.
• Chapter I.: Some True Religion Exists In the World.
• Chapter II.: Religion Is Both Interior and Exterior.
• Chapter III.: No Better Life Can Be Found Than the Christian Life.
• Chapter IV.: The End Presented to Us By the Christian Religion Is the Best Which Can Possibly Be Conceived.
• Chapter V.: A Christian Life Is the Best Possible Means For Attaining to Happiness.
• Chapter VI.: The Christian Life Is a Most Sure Means of Attaining to Beatitude.
• Chapter VII.: The Faith of Christ Is True, Because It Causes Men to Lead a Perfect Life.
• Chapter VIII.: The Doctrines Taught By Christianity Are True, and Come From God.
• Chapter IX.: The Truth of the Faith Proved By Arguments Founded On the Prayer and Contemplation of Christians.
• Chapter X.: Proofs of the Truth of the Christian Religion Founded On Its External Forms of Worship.
• Chapter XI.: The Truth of Christianity Evidenced By Its Effects On the Interior Life of Christians.
• Chapter XII.: The Truth of Christianity Manifested By Its Visible Effects On the Lives of Christians.
• Chapter XIII.: The Truth of the Faith Demonstrated By the Wonderful Works of Christ, Especially Those Which Pertain to His Power.
• Chapter XIV.: The Truth of Christianity Shown By Arguments Based On the Wisdom of Christ.
• Chapter XV.: The Truth of Christ’s Teaching Is Proved By His Goodness.
• Chapter XVI.: The Truth of Christianity Is Proved By the Power, Wisdom, and Goodness of Christ, Considered Collectively.
• Book III.
• Method Observed Throughout This Book.
• Chapter I.: God Contains Within Himself, and Can Perform, an Infinite Number of Things Surpassing Human Understanding.
• Chapter II.: An Examination of Certain Articles of the Christian Creed Which Exceed the Limits of Human Understanding.
• Chapter III.: The Mystery of the Trinity Is Neither Unreasonable Nor Incredible.
• Chapter IV.: The Christian Doctrine of Creation Is Neither Incredible Nor Unreasonable.
• Chapter V.: The Christian Teaching Concerning the Sanctification, Glory, and Resurrection of Rational Creatures Contains No Article Which Is Either Impossible, Or Unreasonable.
• Chapter VI.: The Doctrine of the Damnation of the Wicked Is One Befitting Christianity.
• Chapter VII.: The Doctrine of the Incarnation of the Son of God Is, In No Sense, Incredible, Unseemly, Or Unreasonable.
• Chapter VIII.: The Belief In the Virginal Birth of Christ Is Consistent With Reason, and His Life Befitted, In All Respects, His Dignity.
• Chapter IX.: The Christian Doctrine of Original Sin Is Neither Unreasonable Nor Incredible.
• Chapter X.: Our Belief In the Passion of Christ, In the Other Mysteries of His Humanity, and In All the Articles Defined By the Church, Is Strictly Consistent With Reason.
• Chapter XI.: The Christian Religion Most Prudently Establishes the Two Precepts of Charity, As the Foundation of Our Whole Moral Life.
• Chapter XII.: The Excellence of the Moral Teaching of the Church.
• Chapter XIII.: The Perfect Reasonableness of the Christian Constitution and Code of Judicial Law.
• Chapter XIV.: The Sacraments of the Church Have Been Instituted By Christ, and Are Admirably Adapted to the Needs of Mankind.
• Chapter XV.: The Number of the Sacraments Is Reasonable.
• Chapter XVI.: The Rites Used In the Administration of the Sacraments Are Both Reasonable and Seemly.
• Chapter XVII.: Answers to Certain Objections Brought Against the Doctrine of the Blessed Eucharist.
• Chapter XVIII.: The Reasonableness of the Ceremonies of the Church.
• Book IV.
• Introduction. Method Observed Throughout This Book.
• Chapter I.: No Religion Except Christianity Can Be True.
• Chapter II.: The Defective and Erroneous Religions Taught By Heathen Philosophers.
• Chapter III.: The Futility and Superstition of the Traditions of Astrology.
• Chapter IV.: Idolatry Is of All Things the Most Vain.
• Chapter V.: A Refutation of the Jewish Perfidy and Superstition.
• Chapter VI.: The Malicious Untruthfulness of Heretics.
• Chapter VII.: The Utter Irrationality of the Mahometan Religion.
• Chapter VIII.: The Christian Religion Will Remain True and Unwavering Unto the End.
• Chapter IX.: Epilogue.

CHAPTER V.

THE MODE IN WHICH OUR ARGUMENT MUST BE CONDUCTED.

Since we attain to the knowledge of the invisible by means of the visible, we must understand, that there are some among the invisible things of God which we can know by the natural power of our understanding, and by means of natural things. Such things are, the Existence of God, His Unity, His Simplicity of Being, and other truths of this sort, to the knowledge of which philosophers have attained. But there are others among the invisible things of God, which we cannot discover by means of human reason. This is not very strange, seeing that, even among men who are equal by nature, philosophers can understand high and subtle matters, of which children and simple persons must remain in ignorance. This being so, is it to be wondered at that in God there are secrets, which no created intellect can investigate? We cannot understand many of the things which we meet with every day; how then shall we comprehend God, who infinitely surpasses all things?

The Divine things which our natural reason is not competent to discover are those which we believe by Faith, to wit, the Trinity and Unity of God, the Divinity and Humanity of our Saviour Jesus Christ, and other truths of the like nature. But, although we cannot prove these truths by natural effects or human arguments, we may, nevertheless, make ourselves very sure of them by their supernatural effects. For, just as, by natural effects, we know that the propositions, “God exists,” and “God is One and Infinite,” etc., are true, and yet by means of them know not God as He is, nor behold His Substance; so also, by means of supernatural effects, we can certify ourselves of the truth of such propositions as “God is Three and One,” “the Son of God is both God and Man”. Yet we cannot understand, nor see these truths, as they are in themselves.

As nature precedes grace, we will first treat of those invisible things of God which we are competent to investigate by means of their natural effects, and afterwards of those which can be known by their effects which are supernatural. The truths of the first category, however, we will consider very briefly, since Catholic theologians and philosophers have discussed them so thoroughly, as to leave no possibility of doubt.