When doing something like this, some find it useful to annotate the text by putting in notes and explanations of what is being said.
(Like pastors at a church when giving the message, or a comedian needing to remember some little things)
It basically just helps the reader not forget side notes or little things that can make the others either more entertained or more helpful.
The main idea of the following passage from ''In Commemoration: One Million Volumes'' is C. The stories told by los viejitos inspired Anaya's love of words and book. Tone and writing style of this excerpt express an inspiration of someone, in this case - Anaya's admiring of words and book.