1) A general leads his smaller army into battle against a much larger enemy force. Before the battle, the general holds a coin offering and tells his troops that if it lands heads, they will win, and if tails, they will lose. It lands heads.
2) The smaller army wins the battle, and the soldiers believe it was predetermined by the gods.
3) The general then shows the soldiers that the coin used in the offering actually had heads on both sides, demonstrating that their fate is not predetermined, but within their own hands through their efforts.