"You wouldn't understand if I told you," she said again.
"Is it fair to say that," said John, "before you've found me wanting in understanding?"
"No, but I know you wouldn't understand. Besides--it's about you."
"The reason why you can't come?"
"Yes."
"What is it?"
"I'll tell you another time, perhaps."
Ah, but that would never do. You can't tell people another time. They don't want to hear it then.
"You can tell me now," persisted John.
She shook her head.