Books of quotation are not only of importance to the reader for what they contain of matured thought, but also for what they suggest. Our brains receive the spark and become luminous, like inflammable material by the contact of flint and steel. – Maturin M. Ballou, January 1886, preface to Edge-Tools of Speech
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