Section — Wouters, Manual of Moral Theology

Scholion I. On Venial Sin by Accident

289.

I. A sin mortal in itself becomes venial by accident:

  1. From invincible erroneous conscience, as if someone holds the theft of a grave thing to be venial.

  2. From defect of perfect consent (St. Thomas, I-II, q. 88, a. 6; St. Alphonsus, V, 54, 55).

  3. Some add: from an excusing cause, which because of only a slight defect does not excuse from the whole. But the legislator, if he urges the substance of a grave precept, seems always to urge it under grave obligation, so that one who injures a grave precept according to its substance without a truly sufficient cause seems to sin gravely.