19:4 Their line. This refers to the surveyor’s “line,” that is, the physical creation, which is everything in space and time. God’s creation is the standard against which all men are measured. The heavens declare the glory of God, but all come short of the glory of God (Romans 3:23). See also Romans 1:20, which tells us that if men fail to see the Creator through His creation, they are “without excuse.”