In honor of Yom Kippur:
Some Old Testament perspective:
26 The LORD said to Moses, 27 “The tenth day of this seventh month is the Day of Atonement. Hold a sacred assembly and deny yourselves, and present an offering made to the LORD by fire.
Leviticus 23.26-27 (NIV)
And the New Testament fulfillment explained by Paul in his letter to the Romans:
23 For everyone has sinned; we all fall short of God’s glorious standard. 24 Yet God, with undeserved kindness, declares that we are righteous. He did this through Christ Jesus when he freed us from the penalty for our sins. 25 For God presented Jesus as the sacrifice for sin. People are made right with God when they believe that Jesus sacrificed his life, shedding his blood. This sacrifice shows that God was being fair when he held back and did not punish those who sinned in times past, 26 for he was looking ahead and including them in what he would do in this present time. God did this to demonstrate his righteousness, for he himself is fair and just, and he declares sinners to be right in his sight when they believe in Jesus.
Romans 3.23-26 (NLT)