How do we know Christ's redemption on the cross is effective?

The effectiveness of Christ's redemptive work on the cross is rooted in its nature as the fulfillment of divine justice. In Hebrews 10:14, it states that by a single offering, Christ perfected for all time those who are being sanctified. This means that His sacrifice not only appeased the wrath of God but also legally justified believers. His perfect life and sacrificial death mean that our sins are imputed to Him and His righteousness is credited to us, establishing a basis for redemption that is not merely theoretical but fundamentally transformational and eternal.