The most important thing to understand is why God became a man. It is not enough to know that God spoke about His incarnation; the reason behind it gives true meaning.

When Adam sinned, he brought a curse and judgment on all creation. The fall did not only affect man, but also everything that man ruled over. In short, creation fell together with man. Because Adam was the first human, all his descendants inherited his sin. This truth is shown in Romans 5:12.

Romans 5:12; “Therefore, just as sin came into the world through one man, and death through sin, and so death spread to all men because all sinned…

However, God’s promise of redemption from this curse and sin is noted in the OT. In Jeremiah 31:31-34 it echoes the plan of God to bring redemption.

Jeremiah 31:31-34; “Behold, the days are coming, declares the LORD, when I will make a new covenant… For I will forgive their iniquity, and I will remember their sin no more.”

(This promise of the New Covenant is fulfilled in Christ, where forgiveness is central.)

God showed His plan of redemption even before it happened, proving His consistency as seen in Isaiah 42:9. The next question is: how was God going to do this?

In the Old Testament, the main way God’s people dealt with sin was through blood and animal sacrifices. These sacrifices were part of the covenant God made with Israel. They showed how serious sin is and that a substitute was needed to take the place of the sinner. We see this in passages like Leviticus 17:11, Leviticus 1, 4, 5, 16, and Exodus 24:8.

But these sacrifices were only temporary. They had to be repeated again and again. Could they truly remove sin? No. Sin is part of human nature. Because Adam sinned, all his descendants inherited that sinful nature. Romans 5:12 explains that everyone born into the world inherits Adam’s sin, even before committing any personal sin. The Psalmist also points to this truth in Psalm 51:5.

Psalm 51:5; “For I was born a sinner yes, from the moment my mother conceived me.

The blood and animal sacrifices could not remove sin from human nature because sin was already part of it. But God had a greater plan. In Jeremiah 31:31–34, He promised a new covenant that would deal with sin completely.

“The day is coming,” says the LORD, “when I will make a new covenant with the people of Israel and Judah. This covenant will not be like the one I made with their ancestors when I brought them out of Egypt. They broke that covenant, though I loved them as a husband loves his wife,” says the LORD. “But this is the new covenant I will make with the people of Israel after those days,” says the LORD. “I will put my instructions deep within them, and I will write them on their hearts. I will be their God, and they will be my people. No one will need to teach their neighbor or relative, saying, ‘You should know the LORD,’ for everyone, from the least to the greatest, will already know me,” says the LORD. “And I will forgive their sins and never again remember their wrongs.”

If God knew that animal sacrifices could not remove sin, why did He command them? He did so because they were signs pointing forward to the ultimate sacrifice—Jesus Christ, the “Lamb of God who takes away the sin of the world” (John 1:29).

Galatians 3:23–24 explains that the law was like a guardian until Christ came. It showed people their need for God and protected them until faith in Christ could make them right with Him.

For God to remove sin from human nature permanently, there had to be a blood sacrifice to establish the new covenant. But this sacrifice had to be perfect—without sin or blemish. The only truly sinless and holy being is God Himself. That is why God gave Himself for mankind through Christ, who is God in human form. Jesus was the spotless Lamb who could take away the sins of the world. Isaiah 53:9 points to this when it says: “He had done no wrong and had never deceived anyone. But he was buried like a criminal; he was put in a rich man’s grave.”

This raises another question: How did Christ, God incarnate, remain sinless? The answer lies in His miraculous birth. Jesus was not conceived by Joseph and Mary in the natural way. He was conceived by the power of the Holy Spirit in Mary’s womb. Because of this, He did not inherit Adam’s sinful nature. If He had, He could not have been the spotless Lamb who takes away sin. Romans 8:3 shows that Christ took on human flesh, but His divine essence as God was never changed. His miraculous conception made it impossible for Him to inherit Adam’s sin, which is why He remained holy and sinless