Biblical doctrine isn’t just true, it’s practical. This is especially the case with the doctrine of justification by faith alone— sola fide. Sola fide may be the most politically powerful doctrine in the universe, I’ve argued elsewhere .

But let’s see if we can put that theory to work with something down to earth, like a Facebook fight between church members.

Church member Joe posts a snide remark on Facebook about the U.S. president’s immigration policies and the havoc his administration is creating at the border. Church member Jill takes offense at Joe’s remark and tells him he lacks compassion. Joe responds with another snide remark, now directed at Jill. She replies in kind. And so it goes, while every church member on Facebook watches.

If Joe and Jill are like most of us, they’re approaching the conversation with a mix of good and bad impulses. Maybe they genuinely care about what’s just, even if they’re making different judgments about what’s most just at the border. Yet they both have an ego to defend and a self-image to project.

A number of biblical doctrines might be usefully applied to this quarrel, but let’s apply sola fide. It’ll help to think about sola fide both objectively (what Christ accomplished) and


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