hi Resko, it's interesting what you said about what Usui sensei was meant to have said.
in th ehistory as told by Takata sensei, Usui sensei went to many spiritual folks, and they said they're concentrating on th emind first, but healing ability will come for them.
Then when he decided to heal in the slums, they always came back. so he then said the temples were right. it was at this point he created an emphasis on gratitude, and also the 5 principles.
As i think Rick Bockner (Takata sensei student) mentioned, the 5 principles start with ourselves, Just for today: don't be angry, worry, be grateful, work hard, be kind to others. so as rick pointed out, it starts with us, but we can see it actually spreads to the whole world, these principles focus.
training oursevles to not be angry, worry, and be grateful, is in fact training our mind.
working hard is training our mind but also our body via discipline.
being kind is the cumlination of it all, our thought, word & deed is now one, in the assistance of all.
So, yeah, if there was a distinction to be made between healing of mind & body, some styles do focus on physical healing. IMO, There's a clear path with what Takata sensei said, that is more comprehensive. Simple, yet profound, imo. This is just my take on it though, i havn't been trained in actual Usui Shiki Ryoho.
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warmest wishes
Wayne