The Plumb Line
The term plumb line is used in Scripture in several contexts. The Lord pictures Himself as a builder in Isaiah 28: “See, I lay a stone in Zion, a tested stone, a precious cornerstone for a sure foundation” (Isaiah 28:16). This is a promise of an unshakeable kingdom, with the Messiah in charge. Jesus Christ is the “precious cornerstone” (see Mark 12:10; Acts 4:11; Romans 9:33; 1 Peter 2:6). As the Lord builds His kingdom, He will ensure it is perfect in every way: “I will make justice the measuring line and righteousness the plumb line” (Isaiah 28:17). There will be no crookedness/sin in the kingdom of Christ.