How do we know that God justifies sinners?

The doctrine of justification is central to the Christian faith, rooted in the character of God who is both just and the justifier of sinners. In Genesis 15, the sacrificial system God establishes signifies the seriousness of sin and the cost of atonement. Through the sacrifices, believers can see that God does not compromise His justice but instead satisfies it through the substitutionary atonement of Christ. This foreshadows the ultimate sacrifice that Jesus made, enabling God to justly forgive those who believe in Him.