I think one key might be resilience in the face of failure. Not the experience of failure per se.

From an "I Wish I Had Never Gone to Law School and am Now a Career Coach Blog":

"In a nutshell, resiliency is

having a flexible, optimistic attitude
responding positively to ambiguity
being proactive, rather than reactive, and
adopting a mind set that is open to change, and exploration."

https://leavinglaw.wordpress.com/20...each-you-about-your-legal-career-search/