the walls of Jericho made by man ,and the walls of tyre in Ezekiel 26 . . .
7For thus says the Lord God: Behold, I will bring from the north upon Tyre [b]Nebuchadrezzar king of Babylon, a king of kings, with horses and chariots and with horsemen and a host of many people.
8He shall slay with the sword your daughters [the towns and villages] in the level area [on the mainland], and he shall make a fortified wall against you and cast up a siege mound against you and raise up a roof of bucklers and shields as a defense against you.
9And he shall set his battering engines in shock against your walls, and with his axes he will break down your towers.
10Because of the great number of [Nebuchadrezzar’s] horses, their dust will cover you; your walls [O Tyre] will shake at the noise of the horsemen and of the wagon wheels and of the chariots, when he enters into your gates as men enter into the city in whose walls there has been made a breach.
it takes the spirit to know the spirit ,
1 Corinthians 2:14
But a natural man does not accept the things of the Spirit of God, for they are foolishness to him; and he cannot understand them, because they are spiritually appraised.
If our vessel is empty the eyes are blind