Why is believing in Jesus as the Lamb of God important for Christians?

For Christians, belief in Jesus as the Lamb of God is foundational to the faith because it directly relates to salvation. Jesus' sacrificial death on the cross serves as the atonement for sin, allowing those who believe to be reconciled with God. As laid out in John 1:12-13, 'But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name.' This indicates that faith in Christ transforms believers into children of God, not born out of human decision but through divine will. Moreover, by believing in the Lamb of God, Christians tap into a relationship marked by grace and ongoing sanctification, as they continue to behold and follow Christ.