In the natural, a “firewall typically establishes a barrier between a trusted network and an untrusted network, such as the Internet”. Wikipedia.
In the spiritual, the Blood of Jesus is our firewall, against the attacks of the enemy. Hear what the Lord is saying through His prophet Isaiah:
“In the west, people will respect the name of the Lord; in the east, they will glorify him. For he will come like a raging flood tide driven by the breath of the Lord.”
Isaiah 59:19 NLT
My brothers and sisters, daily, this Firewall must be up because there is no downtime for the enemy.
