Jayber Crow, p. 54

I said, "Well," for now I was ashamed, "I had this feeling maybe I had been called."

"And you may have been right. But not to what you thought. Not to what you think. You have been given questions to which you cannot be given answers. You will have to live them out--perhaps a little at a time."

"And how long is that going to take?"

"I don't know. As long as you live, perhaps."

"That could be a long time."

"I will tell you a further mystery," he said. "It may take longer."