How Do I Know What I Think Until I See What I Say?

Recently, I read a post over at Brazen Careerist in which she says that the worst career advice she's ever heard was " do what you love ."* Yeah, I totally agree. Once upon a time, a long long time ago, in a land far far away, I was going to be an English professor. I loved teaching.** I spent hours and hours preparing lessons plans and assignments. And hours and hours grading papers. And I loved every second in front of my classes*** and working with my students. And I was good at it.**** But the thing about doing what you love is that, when you love something, everything matters. Every mistake, every minute, every mile. I would dissect my lessons and try to perfect them (which any teacher will tell you is impossible. Teaching requires students, and the students are different each time, so a lesson that worked perfectly in one class will bomb in another. In teaching, there is no perfect. There is only good.). I poured my heart into it, for years. And then I