Penance is any act or a set of actions done out of contrition for sins committed, as well as an alternative name for the Catholic, Eastern Orthodox, and Oriental Orthodox sacrament of Reconciliation or Confession.
The word penance derives from Old French and Latin paenitentia, both of which derive from the same root meaning repentance, a sincere change of heart and feeling of remorse (contrition). Penance and repentance, similar in their derivation and original sense, have come to represent conflicting views of the essence of repentance, arising from the controversy in the Protestant Reformation as to the respective merits of "faith" and "good works".
