Why is the altar important in measuring God's kingdom?

In the context of measuring Christ's kingdom, the altar represents the sacrifice for sin made by Jesus Christ. This altar signifies not just a physical structure but embodies the essential theological truth that only through the death of Christ can sins be atoned for. The measuring of the altar highlights its character, emphasizing that God's holiness demands a sacrifice for sin and that this requirement has been perfectly met in Christ. Therefore, understanding the altar is critical as it reassures believers that they are secure because Christ's sacrifice is accepted by God. This positions believers within the safe confines of Christ's kingdom, where their sins are fully atoned for.