“...One of the most important lessons, perhaps, is the fact that SOFTWARE IS HARD. From now on I shall have significantly greater respect for every successful software tool that I encounter. During the past decade I was surprised to learn that the writing of programs for TeX and Metafont proved to be much more difficult than all the other things I had done (like proving theorems or writing books). The creation of good software demand a significiantly higher standard of accuracy than those other things do, and it requires a longer attention span than other intellectual tasks.”
![“[The Euclidean algorithm is] the granddaddy of all algorithms, because…” quote by Donald Knuth](https://sms4smile.com/quotes/img-quotes/880/donald-knuth-8762_algorithms_the-euclidean-algorithm-is-the-granddadd_96085.jpg)
