Getting hung up on "Surrender your body to a greater mind"

I've almost finished Becoming Supernatural, and maybe I missed it somewhere, but I get so confused by what the mechanics of "surrending" really look like. I haven't heard anyone mention it, and JD hasn't seemed to explain it in what I've read so far. But in the meditations, that's always a key part. I have an inkling that trying to figure out HOW is probably counterproductive, but I'm still very curious as to what it truly means.

I have a hard time doing something fully if I don't have all of the details, so it's been a little frustrating when I have a great meditation, just to hear that instruction at the end and start thinking again. Any help is appreciated, thank you!