How do we know Jesus' sacrifice is the solution to sin?

Jesus' sacrifice on the cross is the ultimate solution to sin, rooted in God's sovereign plan. The necessity of Christ being lifted up on the cross ensures that anyone who believes in Him will not perish but will receive eternal life (John 3:15). This reflects the divine initiative in providing a remedy for sin, showing that forgiveness is ultimately the prerogative of God alone. Just as the Israelites had to look at the brazen serpent to be healed, we too must look to Christ in faith, believing in His promise of salvation. The work of Christ is an expression of God's grace and mercy, not contingent upon human merit but solely upon faith in Him.