Sin

thumb|Depiction of the sin of Adam and Eve ([[The Garden of Eden with the Fall of Man by Jan Brueghel the Elder and Pieter Paul Rubens)]]

thumb|In many Abrahamic religions, demons are considered to be evil beings and are contrasted with angels, who are their good contemporaries.|354x354px Evil, as a concept, is usually defined as profoundly immoral behavior, and it is related to acts that cause unnecessary pain and suffering to others.

thumb|upright|Henry Fuseli, [[Virtue reclaiming Youth from the arms of Vice, 1806–1807]]

dichotomy in religion, ethics, and philosophy

thumb|right|1868 allegory of backbiting based on [[Psalms, "the wicked bend their bow, they make ready their arrow upon the string, that they may privily shoot at the upright in heart" (11:2) and "their tongue a sharp sword" (57:4)"]] Backbiting or tale-bearing is to slander someone in their absence — to bite them behind their back. Originally, backbiting referred to an unsporting attack from the rear in the blood sport of bearbaiting.

Israf (, ) is an Arabic term used in Islamic law, roughly translated as "extravagance" or "wasteful expenditure."

Mohandas Gandhi's list of negative qualities

A sin-eater is a person who consumes a ritual meal in order to spiritually take on the sins of a deceased person. The food was believed to absorb the sins of a recently dead person, thus absolving the soul of the person.

doctrine that the sins of our ancestors lead to the punishment of their descendants

In Judaism, violation of any of the 613 commandments