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
Finished on the inside "Those stretcher bars were finished on the inside in ways no one will ever know; I spent days, weeks, months finishing things no one is ever going to see. But it had much more to do with the fact that I couldn't leave them unfinished. I just had this conviction that in the sense of tactile awareness, if all those things were consistent, then the sum total would be greater, even though that might not be definable in any causal, connected way." Lawrence Wechler & Robert Irwin, Seeing Is Forgetting the Name of the Thing One Sees All the way throughInvisible substanceCompleting work properly in unseen areas craft