By Teaching, We Learn… and Vice Versa

On writing his first book, Henry Hazlitt recalled:

I primarily wanted to teach myself how to think more efficiently, independently, and, if possible, originally. I had already sensed that he who teaches, learns.'"

Here Hazlitt paraphrased the Latin proverb docendo discimus ("by teaching, we learn") which the Stoic philosopher Seneca expressed as, "Men learn while they teach."

This ancient wisdom has been seconded by modern researchers, who have called the psychological phenomenon the protege effect."