This is a misquote of Peter Drucker, a management theorist.
This misquote is flawed in a management setting since its a generalization and people are more than numbers, but might be a decent philosophy for self-reflection and improvement.
- How can I know how I feel about my relationships and know where people stand in my life if I never reflect in an organized way?
- How do I know what I need to learn if I don’t know what I don’t know?
- How can I find more time for things I enjoy if I don’t know what I spend my time doing?
- How can I get shredded if I don’t know how many calories I’m consuming?
- How can I lift more weight or run faster if I don’t know what baselines I need to measure against?