Confession, in many religions, is the acknowledgment of one's sins (sinfulness) or wrongs.
Buddhism has been from its inception primarily a tradition of renunciation and monasticism. Within the monastic framework (called the Vinaya) of the sangha regular confession of wrongdoing to superiors (elders; Pali: Thera) is mandatory. In the sutras of the Pali Canon Bhikkhus confessed their wrongdoing to the Buddha himself. That part of the Pali Canon called the Vinaya requires that monks confess their individual sins before the bi-weekly convening for the recitation of the Patimokkha.
In Catholic teaching, the Sacrament of Penance is the method of the Church by which individual men and women may confess sins committed after baptism and have them absolved by God through the administration of a Priest. Although it is not mandatory, the Catholic rite is usually conducted within a confessional box, booth or reconciliation room. This sacrament is known by many names, including penance, reconciliation and confession (Catechism of the Catholic Church, Sections 1423-1442). While official Church publications usually refer to the sacrament as "Penance", "Reconciliation" or "Penance and Reconciliation", many laypeople continue to use the term "Confession" in reference to the Sacrament.
For the Catholic Church, the intent of this sacrament is to provide healing for the soul as well as to regain the grace of God, lost by sin. A perfect act of contrition even outside of confession removes the eternal punishment associated with mortal sin but a Catholic is obliged to confess his or her mortal sins at the earliest opportunity. In theological terms, the priest acts in persona Christi and receives from the Church the power of jurisdiction over the penitent. The Council of Trent (Session Fourteen, Chapter I) quoted John 20:22-23 as the primary Scriptural proof for the doctrine concerning this sacrament, but Catholics also consider Matthew 9:2-8, 1 Corinthians 11:27, and Matthew 16:17-20 to be among the Scriptural bases for the sacrament.