"We have heard of the pride of Moab; he is very proud: even of his haughtiness, and his pride, and his wrath: but his lies shall not be so. Therefore shall Moab howl for Moab, every one shall howl: for the foundations of Kirhareseth shall ye mourn; surely they are stricken." (Isaiah 16:6-7)
Isaiah now turns his attention to that which would prevent Moab from finding the rest promised in the previous verses - pride. Deliverance would not come for Moab because she was a very proud nation. Even a cursory review of the Moabite Stone would be sufficient to reveal the arrogance of the nation. Concerning his victory over Israel, King Mesha wrote, "...I looked down on him and on his house. And Israel has been defeated forever...."
The text says, "...his lies shall not be so...." Moab's prideful words against God and His chosen people were nothing more than lies, and they would not stand the test of time. Instead every citizen would wail for his defeated and broken country. Kir of Moab (15:1), Kir-hareseth, and Kir-haresh (16:11) are likely all the same city. If so, Kir-hareseth was a fortress city overlooking the Dead Sea. As a highly fortified stronghold, its fall to the enemy would be a lamentable occurrence.
Pride will deprive any individual of God's blessing upon his life just as it prevented the Moabites from finding deliverance.