Jamieson, Fausset and Brown on Judges 8:22-23

22-23. the men of Israel said unto Gideon, Rule thou over us ... Gideon said unto them, the Lord shall rule over you--Their unbounded admiration and gratitude prompted them, in the enthusiasm of the moment, to raise their deliverer to a throne, and to establish a royal dynasty in his house. But Gideon knew too well, and revered too piously the principles of the theocracy, to entertain the proposal for a moment. Personal and family ambition was cheerfully sacrificed to a sense of duty, and every worldly motive was kept in check by a supreme regard to the divine honor. He would willingly act as judge, but the Lord alone was King of Israel.