Who said "Knowledge of yourself is the most important knowledge."?

This quote is attributed to Cristina Yang.

Knowledge of yourself is the most important knowledge. - Cristina Yang

"Knowledge of yourself is the most important knowledge."

Cristina Yang Knowledge

"I'm not just a female surgeon. I'm a surgeon."

"You don't have to see the whole staircase, just take the first step."

"I want to be extraordinary."

"Medicine is a science, not an art. There are rules."

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."