"And—if there were a flaw?"
"The whole thing, don't you see, would break down; it would be no good. In fact, it would be awfully dangerous."
"To whom?"
"To you—to them, the people you're helping. You make a connection; you smash down all the walls so that you—you get through to each other, and supposing there was something wrong with you, and It doesn't work any longer (the Power, I mean), don't you see that you might do harm where you were trying to help?"
"But—Agatha—there was nothing wrong with you."
"How do I know? Can anybody be sure there's nothing wrong with them?"
"You think," said Milly, "there was a flaw somewhere?"
"There must have been—somewhere ..."
"What was it? Can't you find out? Can't you think? Think."
"Sometimes—I have thought it may have been my fear."