Jephthah vowed a vow to Yahweh, and said, If you will indeed deliver the children of Ammon into my hand,
"The spirit may be an effective power; but it seems that it is not automatically effective, at least not in terms of effecting deliverance. The spirit comes upon or possesses human beings; therefore, it must be embodied with cooperation and faithfulness if deliverance is to be effected . . ." [Note: McCann, p. 82.] 