"In my judgment, a great mistake has been made by well- meaning and zealous men, through treating error and infidelity with altogether too much respect. I believe that it is safe to say that Christianity is indebted for none of its progress in the world to rational conflicts with infidelity. I do not believe that a single great wrong has ever been overthrown by meeting the advocates of wrong in argument."
January 1, 1970
https://en.wikiquote.org/wiki/Religious_infidelity