397. How does sin proliferate?Sin creates a proclivity to sin; it engenders vice by repetition of the same acts.
Further reading: CCC 1865, 1876398. What are vices?Vices are the opposite of virtues. They are perverse habits which darken the conscience and incline one to evil. The vices can be linked to the seven, so-called,
capital sins which are: pride, avarice, envy, anger, lust, gluttony, and sloth or acedia.
Further reading: CCC 1866-1867