Pliny the Younger Quote
You say you have nothing to write about. Well, you can at least write about that—or else simply the phrase our elders used to start a letter with: 'If you are well, well and good; I am well.' That will do for me—it is all that matters.
letter to Fabius Justus, in Letters (Loeb ed., 1969) bk. 1, sect. 11