“He doeth whatsoever He willeth, and ordaineth whatsoever He pleaseth.”

... "In like manner, a skilled physician “doeth whatsoever he willeth” in treating the patient, and the latter has no right to object. Whatsoever the physician may say or do, the same is sound and true, and he must be regarded by all as the embodiment of “He doeth whatsoever He willeth, and ordaineth whatsoever He pleaseth.” The physician will doubtless prescribe remedies that are at variance with popular notions, but is it permissible for those who have no knowledge of science and medicine to object? No, by God! On the contrary, they must all acquiesce and follow whatsoever the skilled physician prescribes. Thus, the skilled physician “doeth whatsoever he willeth”, and the patients have no share in this station. First, the skill of the physician must be ascertained, and once this has been done, he “doeth whatsoever he willeth”." ...

‘Abdu’l-Bahá, Some Answered Questions