Eliza enters, sunny, self-possessed, and giving a staggeringly convincing exhibition of ease of manner. She carries a little work-basket, and is very much at home. Pickering is too much taken aback to rise.
LIZA. How do you do, Professor Higgins? Are you quite well?
HIGGINS [choking] Am I— [He can say no more]. (5.115-117)
Eliza. You see, really and truly, apart from the things anyone can pick up (the dressing and the proper way of speaking, and so on), the difference between a lady and a flower girl is not how she behaves, but how she's treated. I shall always be a flower girl to Professor Higgins, because he always treats me as a flower girl, and always will; but I know I can be a lady to you, because you always treat me as a lady, and always will. (5.143)
HIGGINS. If you come back I shall treat you just as I have always treated you. I can't change my nature; and I don't intend to change my manners. My manners are exactly the same as Colonel Pickering's. (5.191)