John 18:37-40 (ESV)
Then Pilate said to him, “So you are a king?” Jesus answered, “You say that I am a king. For this purpose I was born and for this purpose I have come into the world—to bear witness to the truth. Everyone who is of the truth listens to my voice.” Pilate said to him, “What is truth?”
After he had said this, he went back outside to the Jews and told them, “I find no guilt in him. But you have a custom that I should release one man for you at the Passover. So do you want me to release to you the King of the Jews?” They cried out again, “Not this man, but Barabbas!” Now Barabbas was a robber.
We know very little of this Barabbas. All we know is that he was a criminal, condemned to death. Pilate, to keep peace with the Jews, had a tradition during Passover to grant clemency to anyone they chose. In this case he simply gives them a choice. He was NOT really giving Barabbas clemency, however. In the past the criminal went free. That is clemency. In this case the criminal was going free, but Jesus was taking his place, to pay his debt. This was lost on all those people that day, but this is the picture of sacrifical atonement. God designed this from the beginning. The Temple sacrifices in the Old Testament were to show us about substitutionary atonement. The lambs and goats and bulls were a picture of something being offered to God for our sins. They could not permanently remove sin, however.
Hebrews 10:4 (ESV)
For it is impossible for the blood of bulls and goats to take away sins.
Jesus, however, would be that permanent sacrifice. Jesus would take Barabbas place and pay for his crime, since Jesus was quilt free. It was declared innocent in Pilate’s court proceedings. It was also declared by the plan of God. Barabbas would be free. His sins were atoned for by a sacrificial lamb, named Jesus. That is the story of redemption. We were Barabbas! We are Barabbas! Our sins are atoned for by the blood of Jesus.
Romans 3:25 (ESV)
whom God put forward as a propitiation by his blood, to be received by faith. This was to show God’s righteousness, because in his divine forbearance he had passed over former sins.