judges 6:14 And the LORD looked upon him, and said, Go in this thy might, and thou shalt save Israel from the hand of the Midianites: have not I sent thee? - Free Bible Online

      14-16. the Lord looked upon him, and said, Go in this thy might . . . have not I sent thee?--The command and the promise made Gideon aware of the real character of his visitor; and yet like Moses, from a sense of humility, or a shrinking at the magnitude of the undertaking, he excused himself from entering on the enterprise. And even though assured that, with the divine aid, he would overcome the Midianites as easily as if they were but one man, he still hesitates and wishes to be better assured that the mission was really from God. He resembles Moses also in the desire for a sign; and in both cases it was the rarity of revelations in such periods of general corruption that made them so desirous of having the fullest conviction of being addressed by a heavenly messenger. The request was reasonable, and it was graciously granted [Jud 6:18].

JFB.