I once discussed a related topic about humans with an eminent professor of neurosciences & head of an MRC unit.
It had be found by clinical trial in USA that patients who had a religious faith & knew they were being prayed for, recovered significantly more quickly from heart attacks & major abdominal surgery. To the annoyance of 1 group, there were no differences in outcome between the major faiths!
I suggested that we were seeing a natural phenomenon. We came to the tenative suggestion that patients who were prayed for, felt less anxious. The effect on the body would be to change the metabolism from adrenalin driven tissue breakdown, to conditions favourable for tissue repair. ie we felt that relief of stress through other humans was a factor to be considered in a speedy recovery. Old fashioned nursing care & bedside manner!
I don't believe that we can change the material world simply by power of thought. It is more about changing the state of mind, & through that the body's metabolic processes.