The condemnation of the evils of Israel continues, and Isaiah pronounces upon them the wrath of the Lord. "Enter into the rocks, and hide in the dust" is an Eastern saying which means. "Flee for your life, be ashamed and confounded." Palestine has many caves which are used as hiding places in time of war." ( Lamsa, George. Old Testament Light. P. 619-20).
The time shifting in this chapter continues, with the discussion of past sins leading to the discussion of future retribution.