The more an idea is developed, the more concise becomes its expression: the more a tree is pruned, the better is the fruit. – Alfred Bougeart, quoted in A Thousand Flashes of French Wit, Wisdom, and Wickedn

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

Mr. [Thomas] Gray the poet has often observed to me that if a man were to form a Book of what he had seen and heard himself it must in whatever hands prove a most useful and entertaining one. – Horace Walpole, quoted in Walpoliana, 1800