[bananatron]

The reverse (physical response > action) certainly seems true. - if you sit and smile for 2 minutes straight, you're more likely to feel at least a little better.

We're all in some kind of delusion as our storytelling minds build up the world around us (and us in it). I believe the author is referring to crafting our delusions in some intentional way (although I don't have great examples myself of this working).