How do we know Jesus is the true Lamb of God?

Jesus Christ's identity as the Lamb of God is affirmed through various Scripture passages that illustrate the necessity and significance of His sacrifice. John 1:29 records John the Baptist proclaiming Him as the Lamb of God who takes away the sin of the world. Additionally, the prophetic nature of Scripture points to Jesus's fulfillment of Old Testament types and shadows, such as the sacrificial lamb in the Passover and the ram provided in place of Isaac. His crucifixion as the appointed sacrifice for God's elect reinforces this truth, as no other sacrifice can satisfy God's justice.