Isaiah seems to indicate that there will be a reversal of fortune, a change in the ways that things happen. The blind will see. The deaf will hear. The lame will run. The dumb will speak. Waters and streams will be in the wilderness desert, as the burning sand will turn into a pool of water. The jackals will be in a swamp. The grass will become reeds or rushes along the streams. Everything will be reversed or different.
Next this oracle takes on a river, the Nile River. The waters will dry up with dire consequences to follow. The Nile River canals and branches will be foul smelling like dry wells. All the reeds, rushes, and plants along the river will dry up and rot away also. The fishermen will have a problem, since their hooks and nets will not catch anything. The flax and cotton looms will be useless. The weavers will be distraught. In fact, anyone who works for any kind of wages will be upset since the Nile River was so important for all kinds of commerce in Egypt.
Sirach explains the actions of an ill-mannered fool. This fool rudely rushes into a house, while a more experienced wise person would wait respectfully outside the house at the door. A boorish fool would peer in through the windows, but the cultivated wise man would remain outside. This ill-mannered fool would listen at the door, but the discreet wise person would be ashamed and disgraced by this kind of behavior.