From now until the end

From now until the end of the month, I'll be posting scraps from the editing room floor as I pare the book I'm writing down to size.

The Professor's Song
By Tom Lehrer

If you give me your attention, I will tell you what I am.
I'm a brilliant math'matician -- also something of a ham.
I have tried for numerous degrees, in fact I've one of each;
Of course that makes me eminently qualified to teach.
I understand the subject matter thoroughly, it's true,
And I can't see why it isn't all as obvious to _you_.
Each lecture is a masterpiece, meticulously planned,
Yet everybody tells me that I'm hard to understand,
And I can't think why.