How do we know that Christ is the true Lamb of God?

Christ as the true Lamb of God is established through various biblical prophecies and His own life, which embody the qualities of the Passover lamb described in Exodus 12. The lamb was to be without blemish, embodied by Jesus who was sinless and perfect, making Him the only suitable sacrifice for sin. In Exodus 12:5, God commands that the lamb must be a 'male of the first year,' which corresponds to Christ, who died in His early thirties, fulfilling every aspect of the law. Furthermore, in 1 Peter 1:19, He is described as a 'lamb without blemish and without spot.' The culmination of this idea emphasizes that only by the blood of Christ can the elect be redeemed, as prescribed by God's sovereign will.