The great work must inevitably be obscure except to the very few to those who like the author himself are initiated into the mysteries. Communication then is secondary: it is perpetuation which is important. For this only one good reader is necessary.
Communication is about being effective not always about being proper.
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But communication is two-sided – vital and profound communication makes demands also on those who are to receive it… demands in the sense of concentration of genuine effort to receive what is being communicated.