They asked not counsel at the mouth at the Lord. – Josh 9:14
What an ominous sound there is in those words! They portend disaster—and it befell. Up to this moment the initiative had always been taken by the Lord. Now for the first time it is taken by Joshua and the people. It was a bad business! Certainly the Gibeonites did their work with guile, and were more than a match for the chosen race. Probably they would not have dared to attempt such a piece of imposition on men of their own sort; but the Israelites seemed a likely prey. They had so recently come into the land, that they might be supposed to be unfamiliar with the guile of Canaan. Yet how astute they fancied themselves!
So the children of God are imposed upon still! Women get married to unconverted husbands, supposing all the while that they are converted. Ministers of churches admit ravening wolves into their midst, deceived by the device of the sheepskin. Young converts get seduced from the simplicity and purity of the faith by lying spirits, that seem as lovely as God’s angels. This is due to their relying on their own judgment, and not asking counsel of God. We must try the spirits, whether they be of God, for many false spirits are gone out into the world. – F. Meyer
[Sometimes the old guys have the best insights]