God mightily used Gideon, initially a timid man who required multiple signs from God, when he began walking more by faith than sight.
God demonstrated to Gideon, through His systematically whittling his army from 30,000 to 300, that His providence, and not Gideon's might, would bring victory.
Gideon began his life as a coward, became a conqueror, and ended a compromiser, all the while needing assurances from God to bolster his flagging faith.
Catholics and Protestants, because of lack of belief, do not find the Bible a sufficient guide to salvation. They claim to believe Christ, yet disobey.