As a mathematician there is a story I hear a lot. It tends to come up whenever I tell someone what I do for the first time, and they admit that they don’t really like, or aren’t very good at, mathematics. **In almost every case,** if I bother to ask (and these days I usually do), **I find that the person, once upon a time, was good at and liked mathematics, but somewhere along the way they had a bad teacher**, or struck a subject they couldn’t grasp at first, and fell a bit behind. From that point on their experiences of mathematics is a tale of woe: because mathematics piles layer upon layer, if you fall behind then you find yourself in a never ending game of catch-up, chasing a horizon that you never seem to reach; that can be very dispiriting and depressing.

— The Narrow Road, Zen and the Art of Mathematics

2011.05.12 Thursday ACHK