In Judaism, the transgression of a law of God is a sin. The laws are the commandments of the Torah, other regulations in the Tanakh, and the interpretations compiled in the Talmud. According to Jewish understanding, every person commits sins in the course of his life. God compensates the appropriate punishment through grace. As mentioned in the prayer Unetaneh tokef on Rosh ha-Shanah and on Yom Kippur, sincere repentance and conversion (Jonah 3:5-10 EU), (Dan 4:27 EU) as well as almsgiving are central elements of atonement.
The common Hebrew word for sin is aveira, literally "transgression" (of a commandment). According to the interpretation of the Tanakh, three forms of sin are distinguished:
- Pesha or Mered: Sin committed deliberately, in conscious rebellion against God.
- Avon: Sin committed emotionally, consciously, but not in rebellion against God.
- Chet: Unintentional sin
According to Jewish teachings, no human being is perfect, and all people sin. However, these actions do not result in permanent damnation; only a few sins are unforgivable. According to the Babylonian Talmud, God's grace is summarized in thirteen attributes:
- God is merciful even before man sins, although He knows that man is capable of sin.
- God is merciful to the sinner after he has sinned.
- God can be gracious even where a human being cannot or does not deserve it.
- God is compassionate and eases the punishment of the guilty party.
- God is gracious even to those who do not deserve it.
- God is not easily angered.
- God's kindness is manifold.
- God is a God of truth; therefore, His promise to forgive the confessing sinner is valid.
- God is kind to future generations, just as the descendants of Abraham, Isaac and Jacob experienced His kindness.
- God forgives sins consciously committed when the sinner repents.
- God forgives the deliberate angering of Himself when the sinner repents.
- God forgives sins committed out of error.
- God forgets the sins of those who repent.
Jews are to apply these principles in their dealings with fellow human beings.
According to the Jewish Bible, the "tabernacle" and later the Jerusalem temple were places where the Hebrews or Israelites could offer sacrifices after repenting their sins before God (Hebrew: kippär). Some sins additionally required confession before God. Priests performed the rituals specified in the Torah (singing, prayer, offerings). The holiday of Yom Kippur is a special day when all the Jewish people come together for the forgiveness of their sins.
In the later books of the prophets, rituals without genuine repentance are rejected and the necessary inner attitude of the supplicants toward repentance and conversion is again urged.