With your help I can advance against a troop;
with my God I can scale a wall.
As one who is either a pacifist Christian, or almost completely so (see Miroslav Volf for his change, and why), warfare passages in scripture, specifically in the Old Testament can seen counter Jesus, and in a sense might well be considered so (though read the book of Revelation, but also see Michael Gorman’s book on it which I haven’t read). Tremper Longman in this lecture defends well the teaching of holy war in the Old Testament, countering Greg Boyd’s recent work.
Judgment is both present and future, and I let some of the hard questions go. What I’m settled in is that for the people of God today, holy warfare amounts to spiritual warfare. The apostle Paul’s words seem to address this for me:
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.
Nevertheless all scripture was written for us, even if not to us. I find Psalm 18 completely encouraging and inspiring for the real life I have to face. We are not called to a passive existence where we do nothing, unlike what some advocate, as if anything else is opposed to God’s grace. No. In Christ we are given strength from God to do what we must. And any holy war today would never be physical:
Finally, be strong in the Lord and in his mighty power. Put on the full armor of God, so that you can take your stand against the devil’s schemes. For our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms. Therefore put on the full armor of God, so that when the day of evil comes, you may be able to stand your ground, and after you have done everything, to stand.
We are in a battle no less. And like Longman points out for the actual physical warfare that went on in the Old Testament (and I would highly recommend listening to this lecture), we engage in spiritual warfare in the context of worship and submission to God as prescribed in God’s word.
Find your way to Psalm 18 in your own Bible. Read slowly, meditate, and pray. That is what I’m doing. So that I can find my strength, what I need in God, and what God gives us, in and through Jesus.