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
Burglary's White Whale If all cities already contain the crimes that will occur there, then, taken to its logical conclusion, this suggests there might be a kind of Moby-Dick of crime, a White Whale of urban burglary: a town or city so badly designed that the entire place can be robbed in one go. Geoff Manaugh, A Burglar's Guide to the City Putting the streets to useInvisible Cities