Dr. [Richard] Bentley’s son reading a novel, the Doctor said, “Why read a book which you cannot quote?” – Walpoliana (Horace Walpole, John Pinkerton), “Useless Reading,” January 1800

Dr. Richard Bentley (1662-1742)… is said one day, on finding his son reading a novel, to have remarked—’Why read a book that you cannot quote?’— a saying which affords an amusing illustration of the nature and object of his literary studies. – Cyclopædia of English Literature edited by Robert Chambers, 1844

The aphorist sees in every truth a wise saying, and in every contradiction, two wise sayings. – Robert Brault, rbrault.blogspot.com