This is a German quote – frequently used in the context of alternative medicine – “who heals is right”.

The history of the qutotation is unclear; maybe it is a modification of the Latin “extra ecclesiam salus non est” .

In todays English “the doctor’s always right” (or “might is right”?)

Anyway it is utter nonsense as (1) a healer wants to be successful and not rightful (2) healing (at least on a few occasions) is no proof for the right treatment only fo the good outcome.