The Stoics kept mortality in view on purpose, and not out of morbidity. On why anything in unlimited supply gets treated as worth nothing, and what changes when you do the arithmetic nobody ever assigns you.
Of all the Stoic practices this is the one that sounds worst and works best.
Memento mori — remember that you die. The Stoics wrote it into their morning pages, not to darken the day but to weigh it. A resource of unknown quantity, drawn down daily, non-refundable. There is one honest response to holding something like that, and it is attention.
Seneca’s essay on the shortness of life makes an argument I found genuinely annoying the first time, in the way true things about how you spend your days tend to be. His claim is that the span is not short. It is that most of it is given away — to obligations nobody examined, to grudges, to the deferral of everything that matters until a later that is assumed rather than counted.
The teaching underneath the practice is simple enough to state in a line. Scarcity is where value comes from. Something in unlimited supply is treated as worth nothing, and that includes Tuesdays.
Which is why the fantasy of unlimited time is a theft rather than a comfort. A person who feels immortal — and most people under a certain age quietly do — treats days as though there were an unlimited number of them. Given away on anything. Traded for nothing. Not noticed going.
Then it turns out there were never unlimited days, and the correction arrives all at once, usually by way of a diagnosis or a funeral. Everyone has seen someone go through this. The reports are consistent and they are always about attention: what mattered got instantly clear, and most of what had been consuming them turned out to be nothing.
The Stoic proposal is to make that correction early and on purpose, rather than waiting for the version events deliver.
Two failure modes, and the second is subtle enough that it took me a while to see it.
The obvious one is morbidity: the practice becoming a standing preoccupation with death rather than a glance at it. The Stoics were clear this was a visit. Seconds of clock, hours of consequence.
The less obvious one is urgency. “Life is short” can become a demand that every day be extraordinary, which is its own tyranny and produces a lot of frantic, unhappy people doing things for the photograph. The tradition goes the other way: the point of the reminder is that the ordinary day is the thing, and that the Tuesday you are in is not a rehearsal for a better one.
And if you are actually grieving, or ill, or frightened, this whole practice reads differently and probably should be set down. It is a discipline for the healthy and the distracted. It is not a thing to hand to someone already holding the fact.
Note — not urgency
That reading produces frantic people optimizing their finite time into something worse. The tradition’s version goes the other way: the ordinary day was always the thing, and the counting is only what makes it visible.
The rep is the counting, once a week. The numbers will be estimates, and that is fine — the point was never accuracy. A countable number behaves differently in a mind than an assumed one.
Passages from ancient sources are identified by their standard book and section numbers. Direct quotations follow the translations named below; anything I have marked as a paraphrase is my own wording.
Something in unlimited supply gets treated as worth nothing, and that includes mornings. The counting makes the correction early and on purpose, instead of leaving it to a diagnosis.
It is not a demand that the days be extraordinary. It is what makes an ordinary one visible.