Perception
Time
Once time is a resource to be used, you start to feel pressure, whether from external forces or from yourself, to use it well, and to berate yourself when you feel you’ve wasted it.
In the past, before clocks, Time was just a medium in which life unfolded, the stuff that life was made of. Afterward, once time in life had been separated in most peoples minds, time became a thing that you used. It’s this shaft that serves as a precondition for all the uniquely modern ways in which we struggle with time today