Why will you not believe that a man can cure another?
 Molière, The Imaginary Invalid (1673). copy citation

add
Author Molière
Source The Imaginary Invalid
Topic cure
Date 1673
Language English
Reference
Note Translated by Charles Heron Wall
Weblink https://en.wikisource.org/wiki/The_Imaginary_Invalid

Context

“and to consider things from a philosophical point of view, I don't know of a more absurd piece of mummery, of anything more ridiculous, than a man who takes upon himself to cure another man. ARG. Why will you not believe that a man can cure another? BER. For the simple reason, brother, that the springs of our machines are mysteries about which men are as yet completely in the dark, and nature has put too thick a veil before our eyes for us to know” source