Seneca · On the philosopher's seclusion
Letters 8.6
When I commune in such terms with myself and with future generations, do you not think that I am doing more good than when I appear as counsel in court, or stamp my seal upon a will, or lend my assistance in the senate, by word or action, to a candidate? Believe me, those who seem to be busied with nothing are busied with the greater tasks; they are dealing at the same time with things mortal and things immortal.
Seneca, Letters to Lucilius 8.6, translated by Richard Mott Gummere