Letters 108.28

We must catch that which flees. Now he who scans with a scholar’s eye the lines I have just quoted, does not reflect that our first days are the best because disease is approaching and old age weighs upon us and hangs over our heads while we are still thinking about our youth. He thinks rather of Vergil’s usual collocation of disease and eld; and indeed rightly. For old age is a disease which we cannot cure.

Seneca, Letters to Lucilius 108.28, translated by Richard Mott Gummere