Ay mi, no substantive blog post today

Just not feeling into it today, for some reason. Well, no, not 'for some reason.' I know the reason. Writing troubles. Sigh. You know, I remember when I was in the 5th grade or something, and our teacher had a poster on the wall with a picture of Einstein and a quote from him that said, 'Do not worry about your difficulties in mathematics; I assure you …