They trusted in their own ability

“Your choicest valleys were full of chariots, and the horsemen took their stand at the gates. He has taken away the covering of Judah. In that day you looked to the weapons of the House of the Forest, and you saw that the breaches of the city of David were many. You collected the waters of the lower pool, and you counted the houses of Jerusalem, and you broke down the houses to fortify the wall. You made a reservoir between the two walls for the water of the old pool. But you did not look to him who did it, or see him who planned it long ago.” (Isaiah 22:7–11 ESV)

The people trusted in their own ability to defend themselves, but they failed to trust in the The Lord their God!  They were practical to a fault.  What are you trusting in, your own wisdom and abilities or the Creator of all things?