This results in perverse inclinations which cloud conscience and corrupt the concrete judgment of good and evil. Thus sin tends to reproduce itself and reinforce itself, but it cannot destroy the moral sense at its root. 1866 Vices can be classified according to the virtues they oppose, or also be linked to the capital sins which Christian experience has distinguished, following St. John Cassian and St. Gregory the Great. 1868 Sin is a personal act. Thus sin makes men accomplices of one another and causes concupiscence, violence, and injustice to reign among them.
Sins give rise to social situations and institutions that are contrary to the divine goodness.
They lead their victims to do evil in their turn. It is an offense against God. It rises up against God in a disobedience contrary to the obedience of Christ. 1872 Sin is an act contrary to reason. It wounds man's nature and injures human solidarity.