Strongholds: defined as "1. a place that has been fortified so as to protect it against attack; 2. a place where a particular cause or belief is strongly defended or upheld." Strongholds are designed to be a safe place
2 Corinthians 10:3-5 NIV
“For though we live in the world, we do not wage war as the world does. The weapons we fight with are not the weapons of the world. On the contrary, they have divine power to demolish strongholds. We demolish arguments and every pretension that sets itself up against the knowledge of God, and we take captive every thought to make it obedient to Christ.”