There are so many different types of therapy and medicine: allopathic, homeopathic, naturopathic, chiropractic, osteopathic, energetic, psychiatric, etc.
There is not one method, or medicine (including the dosage) in any field that works for everybody suffering from the same condition. (For those who think that penicillin is a cure-for-all, think again – some people are deathly allergic to it.)
Given that this is a fact, then the only logical conclusion is that individuals decide what will, or will not work for them. There are not only differences between individuals but also differences within individuals – that is, modalities and medicines that once were effective for them, are no longer effective for some reason(s) that arises purely from within them. The modalities and the medicines do not change – only the individual changes.
It is a varying combination of the following aspects of the Self that determines what will help people heal: the mind (conscious), the emotions (subconscious) and the body (unconscious).
“What lies behind us and what lies before us are tiny matters compared to what lies WITHIN US.” ~ Ralph Waldo Emerson