This whole painful irony is especially striking in the case of email, that ingenious twentieth-century invention whereby any random person on the planet can pester you, at any time they like, and at almost no cost to themselves, by means of a digital window that sits inches from your nose, or in your pocket, throughout your working day, and often on weekends, too. The “input” side of this arrangement—the number of emails that you could, in principle, receive—is essentially infinite. But the “output” side— the number of messages you’ll have time to read properly, reply to, or just make a considered decision to delete—is strictly finite. So getting better at processing your email is like getting faster and faster at climbing up an infinitely tall ladder: you’ll feel more rushed, but no matter how quickly you go, you’ll never reach the top. In ancient Greek myth, the gods punish King Sisyphus for his arrogance by sentencing him to push an enormous boulder up a hill, only to see it roll back down again, an action he is condemned to repeat for all eternity. In the contemporary version, Sisyphus would empty his inbox, lean back, and take a deep breath, before hearing a familiar ping: “You have new messages…”

It gets worse, though, because here the goalpost-shifting effect kicks in: every time you reply to an email, there’s a good chance of provoking a reply to that email, which itself may require another reply, and so on and so on, until the heat death of the universe. At the same time, you’ll become known as someone who responds promptly to email, so more people will consider it worth their while to message you to begin with. (By contrast, negligent emailers frequently find that forgetting to reply ends up saving them time: people find alternative solutions to the problems they were nagging you to solve, or the looming crisis they were emailing about never materializes.) So it’s not simply that you never get through your email; it’s that the process of “getting through your email” actually generates more email. The general principle in operation is one you might call the “efficiency trap.” Rendering yourself more efficient—either by implementing various productivity techniques or by driving yourself harder —won’t generally result in the feeling of having “enough time,” because, all else being equal, the demands will increase to offset any benefits. Far from getting things done, you’ll be creating new things to do.