Failure.

Past failure does not mean future success.

Past failure is the hard lessons that sometimes we need in order to be able to succeed.

How do you know you need to pick up that phone to follow up instead of sending another email?

How do you learn when to work more v. taking some time off because everything takes time?

I would rather work with people who have tried, failed, and come out stronger than someone who has only ever found success.

Push to failure.
Learn your lessons.
Repeat.