Perhaps, but some are born more in tune with that level of energy, and others would have to train a lot to get there. I've met some folks who researched crystals heavily to determine how they could assist our interaction with different frequencies, and I've seen things like dowsing in person with reliably and repeatably with remarkable precision. There's a lot we've either forgotten or that has been hidden from us over time, and reclaiming that knowledge is going to be important moving forward. The animal instincts taking over upon possession is an observed thing, if you want to go down dark paths, listen to some real exorcists' experiences and you'll believe that Pratchett has knowledge of that as well.