"I'll do anything," he went on, more and more incoherently. "Anything you tell me. There be some sports are painful-you know. But their labour delight in them sets off. That's what I feel. I mean I'd sweep the floor if you wanted."
"But we've got vacuum cleaners here," said Lenina in bewilderment. "It isn't necessary."
"No, of course it isn't necessary. But some kinds of baseness are nobly undergone. I'd like to undergo something nobly. Don't you see?"

John quotes Ferdinand from Shakespeare's The Tempest here. What is it John attempts to communicate to Lenina?