Why is Christ's sacrifice central to understanding God's grace?

The sacrifice of Christ is not merely a historical event but the very crux of God's plan for salvation. Romans 8:3 states, 'For what the law could not do, in that it was weak through the flesh, God sending His own Son in the likeness of sinful flesh and for sin, condemned sin in the flesh.' This passage underscores that Christ's atonement was necessary due to humanity's inability to achieve righteousness on their own. His sacrificial death satisfied the demands of divine justice, enabling God's grace to extend to sinners. Through faith in Christ, believers are united with Him, ensuring that the righteousness required by God is imputed to them, demonstrating that salvation is not earned but freely given to those chosen by His grace.