How do we know the significance of the Passover lamb?

The Passover lamb is significant because it represents Jesus Christ, the Lamb of God, who takes away the sin of the world (John 1:29). Christ fulfills the symbolism of the Passover by being our perfect, sinless sacrifice. In 1 Peter 2:22, we learn that He committed no sin, affirming that He alone is worthy to bear the sins of His people. Just as the Passover lamb's blood protected the Israelites from judgment, Christ's blood offers us eternal redemption and assures us that we have been justified before God. The lamb without blemish demonstrates the necessity of a perfect sacrifice, which is wholly satisfied in Christ.