Seneca · On the philosopher's seclusion
Letters 8.2
I have withdrawn not only from men, but from affairs, especially from my own affairs; I am working for later generations, writing down some ideas that may be of assistance to them. There are certain wholesome counsels, which may be compared to prescriptions of useful drugs; these I am putting into writing; for I have found them helpful in ministering to my own sores, which, if not wholly cured, have at any rate ceased to spread.
Seneca, Letters to Lucilius 8.2, translated by Richard Mott Gummere