Letters 17.2

You do not seem, when you say this, to know the strength and power of that good which you are considering. You do indeed grasp the all-important thing, the great benefit which philosophy confers, but you do not yet discern accurately its various functions, nor do you yet know how great is the help we receive from philosophy in everything, everywhere,—how, (to use Cicero’s language,) it not only succours us in the greatest matters but also descends to the smallest. Take my advice; call wisdom into consultation; she will advise you not to sit for ever at your ledger.

Seneca, Letters to Lucilius 17.2, translated by Richard Mott Gummere