A Topic of Moral Theology
Parvity of matter
Sins that admit no light matter and sins that become venial when the matter is light.
Also asked about as…
is it a big deal · light matter · small matter (ed.)
In the index as Consent of the will · Malice · Mortal sin · Object of the human act · Sign · Advertence · Concerning mortal sin · Deliberation · Suspicion
In the manuals
Read the manuals side by side → — each work's whole treatment in its own column
A Manual of Moral Theology for English-Speaking Countries
Vol. I, Bk. IV, Pt. I, Chapter II. The Gravity of Sin, nn. 3 & 4 (2 passages — hover a number to read it)
Synopsis of Moral and Pastoral Theology
Vol. II, Fundamental Moral Theology…, On Sins and Vices, nn. 472 & 473 (2 passages — hover a number to read it)
Summa Theologiae Moralis
Vol. I, General Moral Theology, Treatise: On Sins in General, Third Part: On the Effects…, Fourth Question: On Mortal…, Article III: On the Conditions Required for Mortal Sin, nn. ¶1, 538, 539, 540, 541 & 542 (29 passages — hover a number to read it)
Treated under the broader heading Mortal and Venial Sin — Noldin, Summa of Moral Theology · Wouters, Manual of Moral Theology · Bucceroni, Institutions of Moral Theology · Gury-Ballerini, Compendium of Moral Theology (8th ed., 1884) · Koch–Preuss · Vermeersch, Theologia Moralis · Prümmer, Manuale Theologiae Moralis · Marc, Institutiones Morales · Konings, Theologia Moralis · Sabetti-Barrett, Compendium of Moral Theology · Billuart, Summa Summae · Slater, Cases I · Spirago · Slater, Foundation — these works do not divide the matter as finely as we do here, so their treatment stands one heading up (ed.)