When Jesus is called the Lamb of God in John 1:29 and John 1:36, it is referring to Him as the perfect and ultimate sacrifice for sin. To understand who Christ was and what He did, we must begin with the Old Testament, which contains prophecies concerning the coming of Christ as a “guilt offering” (Isaiah 53:10). In fact, the whole sacrificial system established by God in the Old Testament set the stage for the coming of Jesus Christ, who is the perfect sacrifice God would provide as atonement for the sins of His people (Hebrews 10).

Atonement is grounded in God’s covenant love. The Hebrew word for “great love” means God’s loving faithfulness to those within the covenant. God's love for us is not an emotion that can change. God's love is a holy commitment to His people.

God's perfect justice and perfect love combined in the person, death, and resurrection of Jesus. As the spotless Lamb of God, He died as the perfect sacrifice.

The sacrifice of lambs played an important role in the Jewish religious life and sacrificial system. When John the Baptist referred to Jesus as the “Lamb of God who takes away the sin of the world” (John 1:29), the Jews who heard him might have immediately thought of any one of several important sacrifices.

With the time of the Passover feast being very near, the first thought might be the sacrifice of the Passover lamb. The Passover feast was one of the main Jewish holidays and a celebration in remembrance of God’s deliverance of the Israelites from bondage in Egypt.

In fact, the slaying of the Passover lamb and the applying of the blood to doorposts of the houses is a beautiful picture of Christ’s atoning work on the cross. Those for whom He died are covered by His blood, protecting us from the angel of (spiritual) death.

Another important sacrifice involving lambs was the daily sacrifice at the temple in Jerusalem. Every morning and evening, a lamb was sacrificed in the temple for the sins of the people (Exodus 29:38-42). These daily sacrifices, like all others, were simply to point people towards the perfect sacrifice of Christ on the cross. In fact, the time of Jesus’ death on the cross corresponds to the time the evening sacrifice was being made in the temple.

The Jews at that time would have also been familiar with the Old Testament prophets Jeremiah and Isaiah, who foretold the coming of One who would be brought “like a lamb led to the slaughter” and whose sufferings and sacrifice would provide redemption for Israel. Of course, that person was none other than Jesus Christ, “the Lamb of God.”

While the idea of a sacrificial system might seem strange to us today, the concept of payment or restitution is still one we can easily understand. We know that the wages of sin is death (Romans 6:23) and that our sin separates us from God. We also know the Bible teaches we are all sinners and none of us is righteous before God (Romans 3:23). Because of our sin, we are separated from God, and we stand guilty before Him. Therefore, the only hope we can have is if He provides a way for us to be reconciled to Himself, and that is what He did in sending His Son Jesus Christ to die on the cross. Christ died to make atonement for sin and to pay the penalty of the sins of all who believe in Him.

In dying for the sins of the world, Jesus Christ fulfilled and replaced the OT sacrificial system, so that all who believe in him are restored to fellowship with God. Christ is the true high priest, who finally liberates his people from the guilt of sin, by offering himself as the supreme sacrifice.

Martin Luther stated: "Our most merciful Father...sent his only Son into the world and laid upon him...the sins of all men saying: Be thou Peter that denier; Paul that persecutor, blasphemer and cruel oppressor; David that adulterer; that sinner which did eat the apple in Paradise; that thief which hanged upon the cross; and briefly be thou the person which hath committed the sins of all men; see therefore that thou pay and satisfy for them. Here now comes the law and saith: I find him a sinner...therefore let him die upon the cross. And so he setteth upon him and killeth him. By this means the whole world is purged and cleansed from all sins."

The presentation of the death of Christ as the substitute exhibits the love of the cross more richly, fully, gloriously, and glowingly than any other account of it. Luther saw this and gloried in it. He once wrote to a friend:

It is through His death on the cross as God’s perfect sacrifice for sin and His resurrection three days later that we can now have eternal life if we believe in Him. The fact that God Himself has provided the offering that atones for our sin is part of the glorious good news of the gospel that is so clearly declared in 1 Peter 1:18-21.

I love the phrase: “He was chosen before the creation of the world.” God loves us so much that before our creation He had a plan to redeem us and adopt us into His family. Jesus is the Lion of Judah, the Lamb of God, and our friend.