When certain concepts of TeX are introduced informally, general rules will be stated; afterwards you will find that the rules aren't strictly true. In general, the later chapters contain more reliable information than the earlier ones do. The author feels that this technique of deliberate lying will actually make it easier for you to learn the ideas. Once you understand a simple but false rule, it will not be hard to supplement that rule with its exceptions.
Interpretation
This quote discusses the teaching strategy of presenting simplified, inaccurate rules before introducing their complexities.
Donald Knuth highlights an unconventional teaching method where initial oversimplifications serve as a foundational step in understanding more complex concepts later on. By starting with a simplified version, learners can grasp the basic idea, making it easier to later address the nuances and exceptions, thereby enhancing their overall comprehension and retention of the material.
In practice
In a classroom discussion about learning strategies, this quote can be used to illustrate the efficacy of teaching through simplification.
Computer programming is an art, because it applies accumulated knowledge to the world, because it requires skill and ingenuity, and especially because it produces objects of beauty. A programmer who subconsciously views himself as an artist will enjoy what he does and will do it better.
The hardest thing is to go to sleep at night, when there are so many urgent things needing to be done. A huge gap exists between what we know is possible with today's machines and what we have so far been able to finish.
An algorithm must be seen to be believed.
The process of preparing programs for a digital computer is especially attractive, not only because it can economically and scientifically rewarding, but also because it can be an aesthetic experience much like composing poetry or music.
People who are more than casually interested in computers should have at least some idea of what the underlying hardware is like. Otherwise the programs they write will be pretty weird.
Everyday life is like programming, I guess. If you love something you can put beauty into it.
OBSOLETE, adj. No longer used by the timid. Said chiefly of words. A word which some lexicographer has marked obsolete is ever thereafter an object of dread and loathing to the fool writer . . .
I have always felt that the true text-book for the pupil is his teacher
Every time a student walks past a really urgent, expressive piece of architecture that belongs to his college, it can help reassure him that he does have that mind, does have that soul.
Education and health were always matters of charity. You educated children and you helped the sick because they were good things to do, not because you were going to make money out of them. If you let the money-making principle, the profit-seeking motive, anywhere near education and health, things go bad.
The study of history is the best medicine for a sick mind; for in history you have a record of the infinite variety of human experience plainly set out for all to see; and in that record you can find yourself and your country both examples and warnings; fine things to take as models, base things rotten through and through, to avoid.
Indeed, learning to write may be part of learning to read. For all I know, writing comes out of a superior devotion to reading.
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