Here is a nice two-by-two matrix by engineer David E. Goldberg derived from the stoic philosophy of Epictetus. For each and every concern, it’s the cross product of one’s Activity (control vs. no control) and State of Mind (concerned vs. not concerned). And so we have the four combinations:
- Concerned with Control: Accomplishment
- Unconcerned with Control: Forgone Opportunity
- Concerned but No Control: Needless Worry
- Unconcerned and No Control: Peace of Mind
Of course the key is to dwell within the positive Accomplishment and Peace of Mind regions, and not to inhabit the negative ones of Needless Worry and Forgone Opportunity.