As our knees and hips and eyesight deteriorate, we become more dependable, less impulsive, kinder, and less moody. Psychologists call this the maturity principle. My own life experience fits this principle to a T.

When I was 27 years old, I left a very demanding job in management consulting for a job that was even more demanding: teaching. I went to teach seventh graders math in the New York City public schools.

If the quality and quantity of continuous effort toward goals matters as much as I think it does, we may actually get more productive, not less, as we get older - even if we can't pull all-nighters like we used to.

Angela Duckworth Quotes