Back in 1000 B.C., a scrawny young man came up to his nation's army hiding in fear of a loud-mouthed giant. They were frozen.
This young man decided this was young to be the day of action. He had character (1 Samuel 17).
The battle is the Lord's but He uses people. Someone had to speak. Throw the stone. The difference between "..one day I'm gonna.." and "...this is the day..."
Speak your faith to the giants.