What the Bible Says About War
The short answer
Ask what the Bible says about war and you'll find no single verse that settles it. Scripture holds a real tension: God is repeatedly called Israel's protector and defender, yet God's people are also shown taking up arms, posting guards, and building walls. Rather than resolving that tension with a slogan, the Bible often works it out through concrete stories — and few are more concrete than Nehemiah rebuilding Jerusalem's wall.
Here is the puzzle. In Zechariah's vision, God promises to be to Jerusalem "a wall of fire around it" (Zechariah 2:5) — a city so secure in God's protection that it wouldn't even need physical defenses. A generation or so later, Nehemiah devotes himself to rebuilding the city's stone wall, organizing work crews, and setting careful rules about when the gates open and close. If God is the wall of fire, why bother with the wall of brick?
The Old Testament's answer, on the whole, is that Nehemiah was right to build. Divine protection and human responsibility are not rivals. Trusting God does not mean abandoning the practical work of guarding people who are vulnerable — and defending a city does not mean you've stopped trusting God. Nehemiah's workers famously labored with tools in one hand and weapons within reach (Nehemiah 4:17-18), praying and posting watchmen at the same time.
This doesn't hand us a blanket endorsement of war, and it doesn't hand us pure pacifism either. It gives us something more useful: a case study in how faith and defense can belong together. The question the Bible presses is not simply whether force is ever allowed, but whether our defenses serve the protection of the vulnerable — and whether, underneath the walls we build, our confidence still rests in God.
What scholars say
John Goldingay takes the apparent contradiction head-on: if God promised to be Jerusalem's wall of fire, why is Nehemiah building a wall of brick? His answer is that God's promise of protection doesn't remove our responsibility to protect ourselves.
“One of God’s supernatural aides appears and declares that Jerusalem is going to be an open, unwalled city like a village, and there will be so many people and cattle in it. Yahweh will be a firewall around it and will be splendor inside. What is Nehemiah doing rebuilding Jerusalem’s wall of brick if God has promised to be its wall of fire? Yet the Old Testament implies that Nehemiah was indeed doing the right thing. If Nehemiah was aware of Zechariah’s prophecy, perhaps he assumed that the promise that God will be your protector doesn’t mean that you have no responsibility for protecting yourself. (The point about shutting the gates when the sun is hot is not to leave the city vulnerable when everyone is having a siesta.)”
What it means for you
It's tempting to pick a side: either "God will handle it" or "security is up to us." Nehemiah's example refuses that split. Trusting God's protection and taking sensible precautions — for your family, your community, your neighbors who can't protect themselves — are not opposites. Prayer and preparation can be part of the same act of faith.
At the same time, the wall of fire is a check on fear. If your safety measures grow out of panic or a desire to dominate rather than a duty to protect, Zechariah's vision asks you to remember who the real defender is.
In context
Nehemiah, a Jewish official serving the Persian king, returned to Jerusalem in the mid-fifth century BC to rebuild its ruined walls (Nehemiah 1-6). The work faced mockery and threats from local opponents, so builders worked armed and guards were posted. Nehemiah also gave strict instructions about when the city gates could be opened (Nehemiah 7:3). Decades earlier, the prophet Zechariah had received visions encouraging the returned exiles, including one picturing Jerusalem as an unwalled city protected by God himself (Zechariah 2). Nehemiah's project unfolds in the shadow of that promise.