Why is having a substitute important for salvation?

The necessity of a substitute in salvation stems from the principle that all sin incurs a penalty that must be addressed. This is illustrated through the account of Shemai, where his actions led to his downfall, despite David’s mercy. The essence of the gospel is that Jesus Christ acts as our substitute; He bore the punishment for our sins, thus enabling us to be righteous before God. Without this substitutionary atonement, individuals remain under divine justice and cannot escape the consequences of their own sin. Consequently, recognizing Christ as our substitute invites believers into a restored relationship with God, free from the penalty of sin.