I knew it long ago: I'm a compulsive , but I can't teach. The godawful state of today's isn't what's stopping me. I lack at least two of the essential qualifications. I cannot "suffergladly." The smartest of my pupils would get all my attention, and the rest would have to fend for themselves. And I can't handle being interrupted. is the answer. Whatever I have to teach, my students will select themselves by buying the . And nobody interrupts a printed page.

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