A Topic of Moral Theology

The Doubtful Conscience

Why one may never act with a practically doubtful conscience, and how doubts are resolved.

Within this topic

Also asked about as…

doubt whether something is sinful · not sure if it's a sin · uncertain conscience (ed.)

In the index as Doubt (Dubium) · Conscience (Conscientia) · Vow · Reflex principles · Law · Presumption · Certitude · Moral conscience · Possession · Conscience, moral, psychological · Doubt in a moral matter · Probability · Tutiorism · Baptism · Interpretation · Probabilism · Sin · Absolute or mitigated tutiorism · Accused · Actions (Actiones) · Advertence (Advertentia) · Age exempting from ecclesiastical law · Authority of St · Canonical Hours

In the manuals

Summa of Moral Theology (Summa Theologiae Moralis)

§ 2. On Doubtful Conscience., nn. 220, 221 & 222 (3 passages — hover a number to read it)

A Manual of Moral Theology for English-Speaking Countries

Vol. I, Bk. II, Chapter III. The Doubtful Conscience, nn. 1, 2, 3, 4, 5 & 6 (6 passages — hover a number to read it)

Manual of Moral Theology (Manuale Theologiae Moralis)

Vol. I, Bk. I, Tr. II, Diss. II, Pt. I, Sect. III, Ch. II, Art. I, § IV. On the Comparison of the Required Conscience, nn. 221 & 222 (2 passages — hover a number to read it)

Moral Theology: A Complete Course (McHugh & Callan)

Vol. I, Pt. I, Q. IV, Art. 1. The Law of Conscie…, Results of Conscience, nn. 588, 589, 590, 591 & 592 (5 passages — hover a number to read it)

Vol. I, Pt. I, Q. IV, Art. 3. A Certain Conscience, An Uncertain Conscience, nn. 654 & 655 (2 passages — hover a number to read it)

Vol. I, Pt. I, Q. IV, Art. 3. A Certain Conscience, Doubt and Suspicion, nn. 656, 657, 658, 659, 660 & 661 (6 passages — hover a number to read it)

Moral Enchiridion, Comprising Select Decrees and Definitions of the Holy See, of Ecumenical Councils and of the Sacred Roman Congregations (Enchiridion Morale), Fourth Edition

Bucceroni, Moral Enchiridion (4th ed., 1905), On Conscience, n. 100, 139 — Certain and Doubtful Conscience. "11. It is not necessary to reflect upon doubts which occur, whether one is proceeding rightly or not." Proposition of Michael de Molinos condemned by Innocent XI.Read in context →

Institutions of Moral Theology (Institutiones Theologiae Moralis)

Vol. I, On Conscience, V. On Doubtful Conscience, nn. 137–157 (21 passages)

Cases of Conscience, Proposed by Cardinal de Lugo, by Fr. Beniamino Elbel, by Fr. Ioannes Petrus Gury and by Other Authors, and Resolved (Casus conscientiae)

13. On Doubtful Conscience, n. 1 (4 passages — hover a number to read it)

Commentaries on the Nature of Moral Theology, on Conscience and Probabilism, on the Fourth Precept, and on the Sixth and Ninth Precepts of the Decalogue (Commentarii)

Bucceroni, Commentaries (1910), Second Commentary: On Cons…, VI. On Doubtful Conscience, nn. 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169 & 170 (60 passages — hover a number to read it)

Compendium of Moral Theology of Fr. John Peter Gury, S.J., with the Notes of Antonio Ballerini, S.J.

Vol. I, Treatise On Conscience, Ch. II, Article II. On Doubtful Conscience, nn. 40, 41, 42 & 43 (21 passages — hover a number to read it)

Vol. I, Treatise On Conscience, Ch. IV, Article III. On the Use of Probability, and on the Special Rules for Forming Conscience in Doubts, nn. 75, 76, 77, 78, 79 & 80 (41 passages — hover a number to read it)

Synopsis of Moral and Pastoral Theology

Vol. II, Fundamental Moral Theology…, On Conscience, nn. 378, 379, 380, 381, 382, 383, 384, 385 & 386 (9 passages — hover a number to read it)

Theologia Moralis: Principles — Responses — Counsels

Vol. I, Tr. IV, Chapter II: On the Force of Practically Doubtful Conscience, nn. 346, 347, 348, 349 & 350 (5 passages — hover a number to read it)

Vol. I, Tr. IV, Ch. III, Article II: On Negatively Doubtful Conscience, nn. 372, 373, 374 & 375 (4 passages — hover a number to read it)

Institutiones Morales Alphonsianae

Vol. I, Part First: On the First P…, Tr. I, Chapter II: On Certain and Doubtful Conscience, nn. ¶1 & ¶2 (2 passages — hover a number to read it)

Vol. I, Part First: On the First P…, Tr. I, Ch. II, Article II: On the Manner of Laying Aside Doubtful Conscience by Reflex Principles, nn. ¶41, ¶42, ¶43, ¶1, ¶44, ¶45, ¶46, ¶2, ¶47, ¶3, ¶48, ¶49, ¶50, ¶4, ¶51, ¶52, ¶53, ¶54, ¶55 & ¶56 (20 passages — hover a number to read it)

Manuale Theologiae Moralis

Vol. I, Pt. I, Tract IV. On Conscience, Ch. V, Art. II, On Moral Doubt, n. ¶50 — For the sake of clarity the present article is divided into two paragraphs: 1. concerning the notion and division of doubtful conscience or moral doubt; 2. concerning the means for solving practical doubt. Strictly and a… Read in context →

Vol. I, Pt. I, Tract IV. On Conscience, Ch. V, Art. II, On Moral Doubt, § 1. On The Notion And Division Of Doubtful Conscience Or Moral Doubt, nn. 328, 329 & 330 (3 passages — hover a number to read it)

Theologia Moralis Sancti Alphonsi: Reduced into a Compendium

Vol. I, Treatise on Conscience, Ch. III, ARTICLE II: ON DOUBTFUL CONSCIENCE, nn. ¶48, ¶49, ¶50 & ¶51 (4 passages — hover a number to read it)

Summa Theologiae Moralis

Vol. II, Special Moral Theology: On…, Treatise: On the Cardinal …, Second Part: On the Virtue…, Ch. II, Question Two: On the Species of Conscience from the Part of the Subject or Certitude, n. 83 (12 passages — hover a number to read it)

Vol. II, Special Moral Theology: On…, Treatise: On the Cardinal …, Second Part: On the Virtue…, Ch. II, Question Two: On the Speci…, Article I: On Negatively Doubtful Conscience, nn. 84, 85, 86 & 87 (16 passages — hover a number to read it)

Vol. II, Special Moral Theology: On…, Treatise: On the Cardinal …, Second Part: On the Virtue…, Ch. II, Question Two: On the Speci…, Article II: On Positively Doubtful Conscience, n. 88 (5 passages — hover a number to read it)

Compendium of Moral Theology

Vol. I, Tr. II, Chapter II. On Certain and Doubtful Conscience, nn. 33, 34, 35, 36 & 36, Q. 2 (5 passages — hover a number to read it)

Christian Theology, Dogmatic and Moral, in Compendium

Bk. II, Diss. I, Chapter IV — On the doubting Conscience, nn. I, II, III, IV, V & VI (6 passages — hover a number to read it)

Bk. II, Diss. I, Chapter V — The two rules are expounded: In doubts the safer part is to be chosen; In doubts the condition of the possessor is the better; and what diligence is required for laying aside a doubt, nn. I, II, III & IV (4 passages — hover a number to read it)

Christian Theology, Dogmatic and Moral, Volume III: On the Decalogue

Diss. II, One Extorted by Fear or Er…, Chapter IV — On the doubtful vow. When the one vowing, in doubt, must fulfill it, nn. I–XXII (22 passages)

A Brief Text-Book of Moral Philosophy

Chapter III: Law the Rule of Human Acts, nn. 98, 99, ¶177, 100, ¶180, 101 & 102 (7 passages — hover a number to read it)

Summa Summae S. Thomae (Billuart)

Billuart, Summa Summae, Tomus II. On the Prima Sec…, On Human Acts, On Conscience, Whether it is lawful to act with a doubtful, probable, or more probable conscience?, nn. 1–15 (15 passages)

Treated under the broader heading Conscience — Bucceroni, Moral Enchiridion · Koch–Preuss · Slater, Cases I · Slater, Religion & Human Interests — these works do not divide the matter as finely as we do here, so their treatment stands one heading up (ed.)