Israel acted as if in two worlds, with many blessings on one hand, and warnings of discipline on the other hand if they refused to follow God. Still today, He wants us to trust Him, follow His instruction and not ignore, and to live in His world, and not the world of earthly things.
(Full title: “My Word shall accomplish that which I purpose, and shall succeed in the thing for which I sent it.” Isaiah 55:10-13)