In the chapter I was reading yesterday, Jacobs offers this from Petrarch, who is explaining his frequent use of quotations from classical authors:
Nothing moves me so much as the quoted axioms of great men. I like to rise above myself, to test my mind to see if it contains anything solid or lofty, or stout or firm against ill-fortune, or to find if my mind has been lying to me about itself. And there is no better way of doing this -- except by experience, the surest mistress -- than by comparing one's mind with those it would most like to resemble. Thus, as I am grateful to my authors who give me the chance of testing my mind against maxims frequently quoted, so I hope my readers will thank me.Another reason to be well-read and pass on what we learn.