Salvation (from Latin: salvatio, from salva, 'safe, saved') is the state of being saved or protected from harm or a dire situation. In religion and theology, salvation generally refers to the deliverance of the soul from sin and its consequences. The academic study of salvation is called soteriology.
Redemption (theology)
In Abrahamic religions and theology, salvation is the saving of the soul from sin and its consequences. It may also be called deliverance or redemption from sin and its effects. Depending on the religion or even denomination, salvation is considered to be caused either only by the grace of God (i.e. unmerited and unearned), or by faith, good deeds (works), or a combination thereof. Religions often emphasize that man is a sinner by nature and that the penalty of sin is death (physical death, spiritual death: spiritual separation from God and eternal punishment in hell).
Atonement in Judaism
In contemporary Judaism, redemption (Hebrew: ISO), refers to God redeeming the people of Israel from their various exiles. This includes the final redemption from the present exile.
Judaism holds that adherents do not need personal salvation as Christians believe. Jews do not subscribe to the doctrine of original sin. Instead, they place a high value on individual morality as defined in the law of God—embodied in what Jews know as the Torah or The Law, given to Moses by God on biblical Mount Sinai.
In Judaism, salvation is closely related to the idea of redemption, a saving from the states or circumstances that destroy the value of human existence. God, as the universal spirit and Creator of the World, is the source of all salvation for humanity, provided an individual honours God by observing his precepts. So redemption or salvation depends on the individual. Judaism stresses that salvation cannot be obtained through anyone else or by just invoking a deity or believing in any outside power or influence.