What is the significance of the altar in the context of mercy and judgment?

In biblical history, the altar is a place where sacrifices were made to atone for sin, serving as a powerful symbol of mercy intertwined with judgment. When sinners approach the altar, they encounter God's justice for sin but are also offered redemption through sacrifice. This duality is fulfilled in Christ's atoning death, where He bore the judgment of sin on behalf of His people. For those who trust in Him, the altar becomes a symbol of grace and peace. In stark contrast, for those who reject Him, it symbolizes condemnation, as seen in Joab's desperate yet futile grasp for mercy.