Fearwall
You need a firewall if you have a computer. It stops some stupid people from being able to destroy or steal your stuff.
You rarely need a fearwall, though. Hiding until things look easier or safer or more respectable is usually not the path to your awesome destiny. Gideon could not become who the angel said he was until he climbed out of the wine press. He was hiding there, doing work that was supposed to be done in a wide open place where the wind could blow away the husks he was beating off his grain.
The angel called him “Valiant Warrior.” When he stepped into that identity out of the place of hiding, he was immediately courageous enough to declare war on every pagan in his village. He knocked over their idol, which was prominently located on the town square.
Then, he declared war on an army that outnumbered him by 10 to 1. Well, that was the match before Yahweh sent 30,000 of his soldiers home before the fight. When God was done setting the odds on the game, he was outnumbered 100 to 1. And he was told not to take any weapons to the event.
What you need is a strong tower. You need the kind that you can take with you onto any battlefield. You will be safe in the name of Yeshua, the Messiah of God. You can even mess it up by anglicanizing it into “Jesus,” and it still has the power to heal the sick, raise the dead, and terrorize your enemies.