At the Garden outside Athens, Epicurus and his students kept a habit of writing down short, compact lines meant to be carried in the mind rather than studied on a shelf — sayings sharp enough to interrupt a bad thought in the middle of thinking it. One of these, collected later among the Vatican Sayings, reads:
One should not spoil what one has by desiring what one has not, but remember that what one has too was the gift of fortune.
The claim is not simply that wanting more is unwise. It is that the wanting actively ruins the thing already held. Picture a full table — bread, oil, a little wine, companions who came a long way to sit there — and one guest whose attention keeps drifting to a grander table down the road. Nothing has been taken from him. He has simply stopped tasting what is in front of him. The meal is intact; the capacity to receive it is gone.
This is the same mechanism Epicurus works through more systematically in his letter to Menoeceus, where he sorts desires into those that are natural and necessary, those natural but not necessary, and those that are neither — empty desires, manufactured by comparison and appetite for status rather than by the body's actual requirements. The natural and necessary desires, he argues, are few and cheaply met: bread satisfies hunger as thoroughly as banquets do, once hunger is the actual problem being solved. Past that limit, more food adds variation, not more satisfaction. Spoiling the present portion by longing for the absent one is, in effect, refusing a wealth already complete and mistaking it for a shortage.
Seneca picks up this exact worry in his seventeenth letter to Lucilius, though he aims it at a different excuse. Lucilius, it seems, kept deferring the serious work of philosophy until his business affairs were settled — a little more security first, then the examined life. Seneca will not allow the postponement. He argues that the mind capable of contentment does not require its circumstances to be finished; waiting for a future arrangement of things is just the Epicurean error dressed up as prudence, craving an absent state of affairs while an entirely usable life sits unspoiled in the present tense, available now, on these terms, not better ones.
The next time attention slides off toward something not yet had — a nicer version of the room, the job, the year — it's worth noticing what's being set down in order to reach for it. Usually something whole. Usually something that was, not long ago, exactly what was hoped for.