“What we actually do is difficult to pin down and sum up. Much of it often seems so inconsequential that our position in the business hardly seems justified. Part of the problem here stems from the distinction between our activities, which is what we actually do, and our output, which is what we achieve. The latter seems important, significant, and worthwhile. The former often seems trivial, insignificant, and messy. But a surgeon whose output is a cured patient spends his time scrubbing and cutting and suturing, and this hardly sounds very respectable either.”