Cognitive psychologist known for his research on expert performance, Ericsson found that achieving elite levels of expertise involves extensive practice, an insight he shared during studies with Duckworth.

As a psychology professor known for his work on learned optimism, Martin Seligman was Angela Duckworth’s PhD advisor at the University of Pennsylvania.

Starting as a Hooters waitress and rising to become the president of the Cinnabon bakery chain, Kat Cole is highlighted as an example of someone turning a job into a calling.

A successful quarterback with the San Francisco 49ers, Steve Young credits his success to relentless practice and the high standards set by his parents.

A comedian with cerebral palsy who performs globally, Martinez attributes her success to the unwavering support and positivity of her parents.

The head coach known for leading the Seattle Seahawks to Super Bowl victory, Pete Carroll credits the Grit Scale as part of his system to develop relentless winners.

Director of Philadelphia's Mural Arts Program, Jane Golden is celebrated as an exemplar of purpose-driven expertise despite living with lupus.

Director of the Harlem Children’s Zone, Geoffrey Canada focuses on the importance of extracurricular programs for inner-city kids’ development and success.

Dyslexic novelist John Irving, known for books like The Cider House Rules, overcame educational challenges through hard work to achieve literary success.

With a unique degree in enigmatology, Will Shortz has been The New York Times puzzle editor since 1993 and credits early support for his puzzle interests for his success.