The Bible is full of heroes like Moses, David, Gideon, and Daniel that showed inspiring courage. God uses even just a single act of courageous faith to do incredible things, to change the world.
It can be difficult to relate to these famous heroes of the Bible. We want to believe they are different than us, maybe more courageous by nature.
But the truth is God uses courageous faith in regular people like you and me and a young Jewish girl like Esther to do incredible things.