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
Time and space Tones appear placed and directed predominantly in time from before to now to later. Their juxtaposition in a musical composition is perceived within a prescribed sequence only. Horizontally, the tones follow each other, perhaps not in a straight line, but of necessity in a prescribed order and only in 1 direction – forward. Tones heard earlier fade, and those farther back disappear, vanish. We do not hear them backward. Colors appear connected predominantly in space. Therefore, as constellations they can be seen in any direction and at any speed. And as they remain, we can return to them repeatedly and in many ways. This remaining and not remaining, or vanishing and not vanishing, shows only 1 essential difference between the fields of tone and color. The accuracy of perception in one field is matched by the durability of retention in the other, demonstrating a curious reversal in visual and auditory memory. Josef Albers, Interaction of Color It will not stand still to be pointed at