As children, when someone asked our age, we might have said, "I'm four", and added, with great solemnity, "and a half." We didn't want anyone to think we were only four. We had traveled so far in those few months, but then again we were modest enough to sense that the huge dignity of turning five was still quite far away. In other words, as children, we were hugely conscious of the rapidity and intensity of human development and wanted clearly to signal to others and ourselves what dramatic metamorphoses we might undergo in the course of our ordinary days and nights.
Once we're past eighteen or so, our progress is still monitored but it is envisaged in different terms: It is cast in the language of material and professional advancement. The focus is on what grades have been achieved, what career has been chosen and what progress has been made in the corporate hierarchy. Development becomes largely synonymous with promotion.
Absolutely love this, never even considered our limited ability to track progress as adults