Let me quote Ricky Jay from Secrets of the Magus
from the New Yorker Magazine
by Mark Singer
"A guy comes up and starts telling me he's a fan," he recalls. "I say thank you, that's nice to hear. He says he used to see me perform in Boulder, Colorado. That's nice, too, I say. Then he starts talking about this wonderful piece I did with a mechanical monkey-really one of the most bizarre routines I ever worked out-and I thank him, and he says, `Yeah, I get a tremendous response when I do that. Audiences just love it.' And I say, `Let me ask you something. Suppose I invite you over to my house for dinner. We have a pleasant meal, we talk about magic, it's an enjoyable evening. Then, as you're about to leave, you walk into my living room and you pick up my television and walk out with it. You steal my television set. Would you do that?' He says, `Of course not.' And I say, `But you already did.' He says, `What are you talking about?' I say, `You stole my television!' He says, `How can you say that? I've never even been to your house.' This guy doesn't even know what a metaphor is. People ask me why I don't do lectures at magic conventions, and I say, `Because I'm still learning.' Meanwhile, you've got people who have been doing magic for ten months and they are actually out there pontificating. It's absurd."