Clearness is the first essential, then brevity, and vigor. Correct repeatedly and stoically.
Erasure is as important as writing.
Prune what is turgid, elevate what is commonplace, arrange what is disorderly, introduce rhythm where the language is harsh, modify where it is too absolute. 65 AD Convert each expression into an equivalent backquote form. Give an example of a specific situation where a macro would be useful or appropriate.