“Pleasure is Nature's test, her sign of approval.”

“Very efficient," a new voice said approvingly. He decided to take it as a sign of approval, anyway. The speaker was a European-looking youth with a slightly haughty air.”

“Sicknesses, especially those affecting nerves and head, are signs that the defensive strength of the strong natures is lacking; precisely this is suggested by irritability, so pleasure and displeasure become foreground problems.”

“I observed you in pain, lad. Pain’s merely the axis of the test. Your mother’s told you about our ways of observing. I see the signs of her teaching in you. Our test is crisis and observation.”

“I don't approve of surprises. The pleasure is never enhanced and the inconvenience is considerable.”

“A cigar is a sort of thing, not exactly a pleasure, but the crown and outward sign of pleasure.”