If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one.
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.
The point isn't to blindly mimic their rhetoric, it's to talk their language: not just the soundbites, but the motivations under them. To use your example, talking about letting Jesus into your heart isn't going to convince anyone to donate a large chunk of their salary to GiveWell's top charities. There's a Christian argument for charity already, though, and talking effective altruism in those terms might well convince someone that accepts it to donate to real charity rather than some godawful sad puppies fund; or to support or create Christian charities that use EA methodology, which given comparative advantage might be even better. But you're not going to get there without understanding what makes Christian charity tick, and it's not the simple utilitarian arguments that we're used to in an EA context.
There is a price: to talk in their language is to accept their framework. If you are making an argument in terms of fighting the oppression of white male patriarchy, you implicitly agree that the white male patriarchy is in the business of oppression and needs to be fought. If you're using the Christian argument for charity to talk effective altruism, you are implicitly accepting the authority of Jesus.