Distinctions:
In fairness, I did not listen to the video posted by the OP, so I have no idea what he said, and I'm not in a position to agree or disagree.
But we might do well to draw some distinctions regarding this whole topic.
1. We might want to draw a distinction between spiritual warfare with spiritual entities, and ordinary self defense with ordinary humans.
Of course there is overlap between the two, but let's consider some thought experiments.
When you drive through a bad neighborhood, do you lock your door?
This is a type of physical self defense... this is not a spiritual defense using spiritual measures.
So let's not get too self-righteous about all of this.
We all take physical measures for physical safety, on a daily basis.
We don't pray OR lock our door; we pray AND lock our door... we act with prudence in a physical world.
2. We might also want to draw some distinctions between what we do, and do not, consider "reasonable" self defense.
I don't think it's a good idea to walk around with a loaded AK so you can just shoot anyone who offends your sensibilities.
But maybe in extreme situations, like someone breaking into your home and attempting to rape your wife... we might all agree there are times to take SOME KIND of forceful action.... whatever that may be.
So I don't think we want to take the position that no physical defense of any kind is ever reasonable or prudent.
I think we'd just want to say it is contingent on a great deal of prudence: what is absolutely necessary, what is most reasonable and prudent, and what also coincides with the Lords specific leading within our own conscience.
If your wife is being raped in front of you, and you say, "I think I'll kneel down and pray a bit, and just use my spiritual weapons, because goodness, I don't want to hurt that poor bloke" ... well, I don't think either God or your wife are going to feel very honored.
I think that, as much as humanly possible, we should be "harmless as doves" - I think this is crucial to Christian living, but even so, there still remains a "time for every purpose."
Even Christ himself, the lamb of God, will become a lion at the appointed time.
3. I am NOT advocating for violence, or lack of compassion, or inattention to our primary focus on spiritual things... I am only advocating for balanced and thoughtful discussion.
These are emotional issues, for all of us.
Whenever issues are emotional, we need to step back, think about them, and give them more careful consideration.
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