Who says the following and why?

"The great secret . . . is not having bad manners or good manners or any other particular sort of manners, but having the same manner for all human souls: in short, behaving as if you were in Heaven, where there are no third-class carriages, and one soul is as good as another. "

Question

Who says the following and why?

"The great secret . . . is not having bad manners or good manners or any other particular sort of manners, but having the same manner for all human souls: in short, behaving as if you were in Heaven, where there are no third-class carriages, and one soul is as good as another. "

AP · Answer

"Higgins claims that the key to acting correctly is treating all people in the same way, acting as if class distinctions did not exist. He thinks that the only society that matters is the society of human souls, to which all men belong." >> https://www.shmoop.com/pygmalion/society-class-quotes-4.html <<

AP · Answer

Also, https://www.enotes.com/homework-help/act-5-pygmalion-by-george-bernard-shaw-268117