Money moved slowly, irregularly, sometimes not at all. Knowledge, on the other hand, was everywhere. My father gave it away with a generosity that would have been admirable if it were not so economically inconvenient. He was not good at saving money. If he had vices like alcohol, gambling or any other ones, this would make sense, but he was a teetotaler who had given up smoking when I was five, this was baffling. I remember a parent once apologising for delayed fees, holding out a crumpled note. My father unfolded it, smoothed it, and handed it back. Next month, he said, already turning to the notebook.