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
The art of taking A Quote fujixweekly.com "By making it possible for the photographer to observe his work and his subject simultaneously, and by removing most of the manipulative barriers between the photographer and the photograph, it is hoped that many of the satisfactions of working in the early arts can be brought to a new group of photographers. The process must be concealed from—non-existent for—the photographer, who by definition need think of the art in taking and not in making photographs. In short, all that should be necessary to get a good picture is to take a good picture, and our task is to make that possible." — Edwin H. Land, co-founder of Polaroid photographyartseeingprocess