As proverbs are meant to be portable, it is essential that they should be packed up in few words… – “Proverbs Secular and Sacred,” The North British Review, February 1858
The quotation-business is booming. No subdivision of the culture seems too narrow to have a quotation book of its own…. It would be an understatement to say that these books lean on one another. To compare them is to stroll through a glorious jungle of incestuous mutual plagiarism. – James Gleick, 1993

