CHAPTER I. (VI.)--OF THE ORIGIN OF MORAL OBLIGATION. Section I.--Of the natural difference between Good and Evil. Section II.--How Good becomes bounden Duty, and Evil is advanced to sin. CHAPTER II. (VII.)--OF THE ETERNAL LAW. CHAPTER III. (VIII.)--OF THE NATURAL LAW OF CONSCIENCE. Section I.--Of the Origin of Primary Moral Judgments. Section II.--Of the invariability of Primary Moral Judgments. Section III.--Of the immutability of the Natural Law. Section IV.--Of Probabilism. CHAPTER IV. (IX.)--OF THE SANCTION OF THE NATURAL LAW. Section I.--Of a Twofold Sanction, Natural and Divine. Section II.--Of the Finality of the aforesaid Sanction. Section III.--Of Punishment, Retrospective and Retributive. CHAPTER V. (X.)--OF UTILITARIANISM. PART III.--NATURAL LAW. CHAPTER I.--OF DUTIES TO GOD. Section I.--Of the Worship of God. Section II.--Of Superstitious Practices. Section III.--Of the duty of knowing God. CHAPTER II.--OF THE DUTY OF PRESERVING LIFE. Section I.--Of Killing, Direct and Indirect. Section II.--Of Killing done Indirectly in Self-defence. Section III.--Of Suicide. Section IV.--Of Duelling. CHAPTER III.--OF SPEAKING THE TRUTH. Section I.--Of the definition of a Lie. Section II.--Of the Evil of Lying. Section III.--Of the keeping of Secrets without Lying. CHAPTER IV.--OF CHARITY. CHAPTER V.--OF RIGHTS. Section I.--Of the definition and division of Rights. Section II.--Of the so-called Rights of Animals. Section III.--Of the right to Honour and Reputation. Section IV.--Of Contracts. Section V.--Of Usury. CHAPTER VI.--OF MARRIAGE. Section I.--Of the Institution of Marriage. Section II.--Of the Unity of Marriage. Section III.--Of the Indissolubility of Marriage. CHAPTER VII.--OF PROPERTY. Section I.--Of Private Property. Section II.--Of Private Capital. Section III.--Of Landed Property. CHAPTER VIII.--OF THE STATE. Section I.--Of the Monstrosities called Leviathan and Social Contract. Section II.--Of the theory that Civil Power is an aggregate formed by subscription of the powers of individuals. Section III.--Of the true state of Nature, which is the state of civil society, and consequently of the Divine origin of Power. Section IV.--Of the variety of Polities. Section V.--Of the Divine Right of Kings and the Inalienable Sovereignty of the People. Section VI.--Of the Elementary and Original Polity. Section VII.--Of Resistance to Civil Power. Section VIII.--Of the Right of the Sword. Section IX.--Of War. Section X.--Of the Scope and Aim of Civil Government. Section XI.--Of Law and Liberty. Section XII.--Of Liberty of Opinion. ADDENDA ET CORRIGENDA p. 31. Aristotle calls the end [Greek: _to telos_]; the means, [Greek: ta pros to telos] (St. Thomas, _ea quae sunt ad finem_); the circumstances, [Greek: ta ein ois hae praxis]. Observe, both end and means are willed _directly_, but the circumstances _indirectly_.