Why illustrate a great piece of writing whose very advocacy and evocation and efficacy lies within its very existence as writing?
The artist does not illustrate science; ... [but] he frequently responds to the same interests that a scientist does, and expresses by a visual synthesis what the scientist converts into analytical formulae or experimental demonstrations.
To think out a problem is not unlike drawing a caricature. You have to exaggerate the salient point and leave out that which is not typical. "To illustrate a principle ," says Bagehot , "you must exaggerate much and you must omit much." As to the quantity of absolute truth in a thought : it seems to me the more comprehensive and unobjectionable a thought becomes, the more clumsy and unexciting it gets. I like half-truths of a certain kind they are interesting and they stimulate.Eric Hoffer
You should keep in mind no names, nor numbers, nor isolated incidents, not even results, but only methods..The method produces numerous results; a few of these will remain in our memory, and as long as they remain few, they are useful to illustrate and to keep alive the rules which order a thousand results.emanuel lasker