You should never think you're too good to do a job, and you should be like that in everything you do.
Podcast: Jocko Podcast 221: Jonny Kim. Navy SEAL, Doctor, Astronaut. The Unimaginable Path.
I'm revisiting this podcast episode (see my brief introduction in Weekly I/O#7.2), and many things in the episode inspire me again.
To help pay out his tuition, Jonny got a job giving out parking tickets in school. From giving orders in combat operations as a Navy SEAL to giving out parking tickets, Jonny takes that as an exercise in humility. I guess that's why despite all the crazy accomplishments, he can still be humble and consider himself physically and mentally average.
"You should never think you're too good to do a job. You should be like that in everything you do. Being a forever new guy is what I try to emulate.
"I don't mean you shouldn't step up to be a leader, but never think that you are above taking out the trash or that you're above not respecting the secretary. The moment you start to think you're better than anyone else, you have poisoned yourself."