How does Jesus’ substitution relate to our eternal life?

The relationship between Jesus’ substitution and our eternal life is foundational to the Christian faith. Because Christ willingly took on the punishment for sin, He accomplished what was needed for our justification. In 2 Corinthians 5:14, it states that 'if one died for all, then all died,' implying that His death was representative of all His people, ensuring their eternal life. Thus, His role as our substitute not only satisfies God’s justice but also establishes our path to eternal life, as confirmed in His resurrection, which guarantees that all who are united with Him will likewise be raised to new life.