How do we know Jesus' substitution is true?

We know the doctrine of Jesus' substitution is true due to its consistent witness throughout the Scriptures. In Romans 5:8, we are told that 'God commendeth his love toward us, in that, while we were yet sinners, Christ died for us,' highlighting the sacrificial role Jesus played on our behalf. Additionally, Isaiah 53 provides a prophetic picture of the suffering servant who bears our iniquities and is crushed for our transgressions, reinforcing the idea that Jesus came to fulfill this role.

Moreover, Hebrews 7:22 asserts that Jesus is the surety of a better covenant, signifying His role as the guarantor of our salvation. This eternal covenant reveals that God's plan for redemption, including Jesus as our substitute, was established before the foundation of the world (Ephesians 1:4-5). Thus, the truth of Jesus' substitution stands firm upon the foundation of God's Word and His redemptive plan.