Designer, implementor, user, writer A Fragment by Donald Knuth dl.acm.org Thus, I came to the conclusion that the designer of a new system must not only be the implementor and the first large-scale user; the designer should also write the first user manual. The separation of any of these four components would have hurt TeX significantly. If I had not participated fully in all these activities, literally hundreds of improvements would never have been made, because I would never have thought of them or perceived why they were important. Eating your own dog food making
You can taste it with your eyes It was one of those good rides, where the motion of the train is soothing, and the interior temperature pleasantly warm but not hot. I imagined the subway car as a rapidly moving load of bread. The motto "You can taste it with your eyes" occurred to me. Nicholson Baker, The Mezzanine Substitutes for the thermal experience food