Gideon incrementally moved from a position of weakness and fear to a position of strength and valor as he increasingly started to trust in God to give victory.

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.

Building a wall requires standing, holding firm, showing alertness and a readiness for action, even if it requires self-denial and unpleasant dirty work.