Why is Christ referred to as our surety?

The concept of Christ as our surety is rooted in His role as the one who guarantees the salvation of His people. Just as Judah offered to be surety for Benjamin, taking responsibility if he failed to return, Christ assures the Father that He will not lose any of those given to Him (John 6:39). This assurance is grounded in His covenant promise to bear the blame for our failures and to fulfill all righteousness on our behalf, effectively securing our redemption through His perfect obedience and sacrificial death.