How do we know Jesus had to be our substitute?

The necessity of Jesus being our substitute is articulated in Hebrews 2:16-17, which reveals that He took on human nature to serve as our merciful high priest and make reconciliation for our sins. Jesus didn't simply die for us; He lived and suffered as one of us, facing temptation and ultimately sacrificing Himself for our transgressions. As a result of His substitutionary atonement, He bore our sin and judgment, embodying the requirements of the law on our behalf. This profound aspect of His mission underscores the truth that no one else could take our place—only Jesus, who was without sin, could fulfill this role.