I'll start to worry about the payroll clerks using the software I design . I'll wonder what I'm doing helping the IRS collect taxes. It will bother me that so many entities-employer, software company, bank, IRS-know so much about the simple act of someone getting paid for labor delivered. I'll think about the strange path of a paycheck direct-deposit, how it goes from employer to bank, company to company, while the person being paid is just a blip, the recipient's account a temporary way station, as the money flows through the bank's hands into the hands of a borrower, then out again through the great engine of commerce.

And I'll have to muddle through without certainties. Without my father's belief that the machinery of capital, if you worked hard and long, was benign in the long run, so benign you could even own a piece of it. Without my generation's macho leftism, which made us think we could smash the machine and build a better one. Without Brian's cocksureness that he was smart enough to know all the machine's little secrets, and so control it.