How we cite our quotes: Citations follow this format: (Chapter.Part.Paragraph)
Quote #4
"Why not? Bernard's an Alpha Plus. Besides, he asked me to go to one of the Savage Reservations with him. I've always wanted to see a Savage Reservation."
"But his reputation?"
"What do I care about his reputation?" (3.123-5)
Clearly the social interactions of the upper castes are a little more nuanced than a simple matter of predetermined caste status.
Quote #5
The liftman was a small simian creature, dressed in the black tunic of an Epsilon-Minus Semi-Moron. (4.1.12)
Notice how this Epsilon is compared to an animal (simian = ape-like); as the novel progresses, all the citizens of the World State—regardless of caste—are rendered similarly bestial. It takes more than intelligence, Brave New World seems to argue, to make a human a human.
Quote #6
Bernard's physique was hardly better than that of the average Gamma. He stood eight centimetres short of the standard Alpha height and was slender in proportion. Contact with members of the lower castes always reminded him painfully of this physical inadequacy. "I am I, and wish I wasn't"; his self-consciousness was acute and stressing. Each time he found himself looking on the level, instead of downward, into a Delta's face, he felt humiliated. Would the creature treat him with the respect due to his caste? The question haunted him. Not without reason. For Gammas, Deltas and Epsilons had been to some extent conditioned to associate corporeal mass with social superiority. Indeed, a faint hypnopædic prejudice in favour of size was universal. (4.2.3)
Bernard has been so indoctrinated by the rules of the caste system that he cannot get over his physical inadequacies. Of course, his height means absolutely nothing intrinsically—it is intelligence that functionally distinguishes an Alpha.