Most people hear a threat in this. Marcus meant it as a lever.

He was not writing to frighten himself. He wrote the line in a private notebook, at war, surrounded by people who flattered him and problems that would outlast him. The thought — this could be the last one — was not despair. It was how he cut through the noise of an ordinary day. A tool, not a tombstone.

Run it against your actual Monday. The meeting you are quietly dreading. The reply you keep drafting and deleting. The thing you would say to someone if you were certain there was still time to say it. Hold each one up to the line. Most of them shrink. A few of them suddenly weigh more than anything on your calendar.

That is the entire function of remembering you are finite: it re-sorts the list. The trivial gets lighter. The postponed gets heavier. You stop handing a scarce morning to work that only feels urgent because it is loud.

You are one day into a number you cannot see the end of, and the average is around thirty thousand of them. Today is one, spent either way.

So before the week fills up: name the one conversation you have been treating as though there is infinite time for it. There isn't. Have it today.