trichotomy of control, n.All

The Trichotomy of control (n.) sorts ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠life into what we fully control, what we cannot control at all, and the large middle we control only in part, like winning at tennis.