Seneca · On the usefulness of basic principles
Letters 95.42
A mullet of monstrous size was presented to the Emperor Tiberius. They say it weighed four and one half pounds (and why should I not tickle the palates of certain epicures by mentioning its weight?). Tiberius ordered it to be sent to the fish-market and put up for sale, remarking: “I shall be taken entirely by surprise, my friends, if either Apicius or P. Octavius does not buy that mullet.” The guess came true beyond his expectation: the two men bid, and Octavius won, thereby acquiring a great reputation among his intimates because he had bought for five thousand sesterces a fish which the Emperor had sold, and which even Apicius did not succeed in buying. To pay such a price was disgraceful for Octavius, but not for the individual who purchased the fish in order to present it to Tiberius,—though I should be inclined to blame the latter as well; but at any rate he admired a gift of which he thought Caesar worthy.
When people sit by the bedsides of their sick friends, we honour their motives.
Seneca, Letters to Lucilius 95.42, translated by Richard Mott Gummere