How do we know that Christ's work is necessary for salvation?

The necessity of Christ's work for salvation is grounded in the concept that God demands absolute perfection from His creation. In Matthew 5:48, Jesus states, 'Be ye therefore perfect, even as your Father which is in heaven is perfect.' Human efforts fall short of this perfection, necessitating a mediator who could fulfill the law's requirements. Christ's perfect obedience and sacrificial death were required to satisfy divine justice and provide righteousness for His people. Consequently, His work is not merely beneficial, it is essential for our salvation, as no other means can secure a right standing before God. Those who trust in Christ can be assured of their justified status through His completed work on the cross.