How do we know that salvation comes through the cross?

Salvation is fundamentally linked to the cross, as Scripture teaches that Christ died for our sins, taking upon Himself the penalty that we deserve (1 Peter 2:24). This act of substitution is not merely an event but a divine necessity, demonstrating God's justice in punishing sin while extending grace to those who believe. Romans 5:9 highlights that we are justified by His blood, reaffirming that through the cross, we are reconciled to God. Our assurance of salvation rests in the sufficiency of Christ's sacrifice, confirming that He has paid the complete price for our redemption.