the one thing that makes me think someone is strong and has really a lot of confidence is someone's ability to admit that they either don't know something or that they're wrong

Wanted to second that quote from another vid, with one by Confucius​ which illustrates well one of my life's guiding principles:

“The man who asks a question is a fool for a minute, the man who does not ask is a fool for life.”

― Confucius