37 See, I will put the wool of a sheep on the grain-floor; if there is dew on the wool only, while all the earth is dry, then I will be certain that it is your purpose to give Israel salvation by my hand as you have said. 38 And it was so: for he got up early on the morning after, and twisting the wool in his hands, he got a basin full of water from the dew on the wool. 39 Then Gideon said to God, Do not be moved to wrath against me if I say only this: let me make one more test with the wool; let the wool now be dry, while the earth is covered with dew. 40 And that night God did so; for the wool was dry, and there was dew on all the earth round it.
Matthew Henry's Commentary on Judges 6:37-40
Commentary on Judges 6:33-40
(Read Judges 6:33-40)
These signs are truly miraculous, and very significant. Gideon and his men were going to fight the Midianites; could God distinguish between a small fleece of Israel, and the vast floor of Midian? Gideon is made to know that God could do so. Is Gideon desirous that the dew of Divine grace might come down upon himself in particular? He sees the fleece wet with dew to assure him of it. Does he desire that God will be as the dew to all Israel? Behold, all the ground is wet. What cause we sinners of the Gentiles have, to bless the Lord that the dew of heavenly blessings, once confined to Israel, is now sent to all the inhabitants of the earth! Yet still the means of grace are in different measures, according to the purposes of God. In the same congregation, one man's soul is like Gideon's moistened fleece, another like the dry ground.