A sick man that gets talking about himself, a woman that gets talking about her baby, and an author that begins reading out of his own book, never know when to stop.

Oliver Wendell Holmes, Sr. (1809-1894) American poet, essayist, scholar

Article (1872-11), “The Poet at the Breakfast-Table,” Atlantic Monthly
    (Source)

Collected in The Poet at the Breakfast-Table, ch. 11 (1872).