Letters 49.8

And all would rightly think me mad if, when greybeards and women were heaping up rocks for the fortifications, when the armour-clad youths inside the gates were awaiting, or even demanding, the order for a sally, when the spears of the foemen were quivering in our gates and the very ground was rocking with mines and subterranean passages,—I say, they would rightly think me mad if I were to sit idle, putting such petty posers as this: “What you have not lost, you have. But you have not lost any horns. Therefore, you have horns,” or other tricks constructed after the model of this piece of sheer silliness.

Seneca, Letters to Lucilius 49.8, translated by Richard Mott Gummere