Relationships, machines, skills, and bodies all punish the assumption that yesterday’s condition guarantees tomorrow’s.

Everything that works today does so because of a condition that is currently being maintained, and none of it holds by default. Skills decay without practice, machines wear, bodies change, and relationships cool when nobody attends to them. Yesterday’s state is a report rather than a guarantee.

Pick whichever of those four you have been assuming will hold on its own. Give it something this week. The assumption is understandable and it is not how any of them work.