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
Seven lamps Ruskin's Seven Lamps of Architecture provided seven guides, or 'lamps', for the troubled craftsman, guides for anyone who works directly on material things. These seven are: The lamp of sacrifice: The willingness to do something well for its own sake. The lamp of truth: The truth that 'breaks and rents continually'; Ruskin's embrace of difficulty, resistance, and ambiguity. The lamp of power: Tempered power, guided standards other than blind will. The lamp of beauty: Which for Ruskin is found more in the detail, the ornament—hand-sized beauty—than in the large design. The lamp of life: Life equating with struggle and energy, death with deadly perfection. The lamp of memory: The guidance provided by the time before machinery ruled. The lamp of obedience: Obedience to the example set by a master's practice rather than by his particular works; otherwise put, strive to be like Stradivari but do not seek to copy his particular violins. Richard Sennett, The Craftsman 125 Best Architecture Books