The Day of Atonement was the one day each year where the high priest of Israel would go before the Lord and intercede on behalf of the people. He would first make atonement for his own sins by sacrificing a bull. Then he would take two goats: one he would killed, while the other would be released into wilderness, bearing the iniquity of the people.
Year in and year out this would take place. No matter how many sacrifices were made, more were always necessary. This is because one bull and two goats is not sufficient to fully atone for sin. It was a symbol, a shadow of a great sacrifice that was to come, one that would render it unnecessary to ever offer another dead animal in payment for sin.
Jesus is greater than one bull and two goats. He was that sacrifice sufficient to pay for every sin of God’s people, past present and future. Listen to the words of Hebrews explaining the greatness of Christ over and above the priests of old:
But when Christ appeared as a high priest… he entered once for all into the holy places, not by means of the blood of goats and calves but by means of his own blood, thus securing an eternal redemption. For if the blood of goats and bulls… sanctify for the purification of the flesh, how much more will the blood of Christ, who through the eternal Spirit offered himself without blemish to God, purify our conscience from dead works to serve the living God.
And every priest stands daily at his service, offering repeatedly the same sacrifices, which can never take away sins. But when Christ had offered for all time a single sacrifice for sins, he sat down at the right hand of God, waiting from that time until his enemies should be made a footstool for his feet. For by a single offering he has perfected for all time those who are being sanctified.
(Hebrews 10:11-14 ESV)
Our sins have all been paid for. One sacrifice was enough for every sin we have ever and will ever commit. And now, Jesus is awaiting the time when He will take His people home to live with Him forever.
Now sit back and watch this: