A person with grit, says psychologist Angela Duckworth, uses passion and long-term perseverance to reach goals. Reaching success, she says, is about stamina over months and years, not talent or a high IQ. In her research, Duckworth studied cadets struggling through their first days at West Point, teachers working in some of the toughest schools, and young finalists in a national spelling bee. She speaks with Aspen Institute President Dan Porterfield about her book "Grit: The Power of Passion and Perseverance," and how parents, mentors, and teachers can instill grit into those they counsel.