What's the Most Impactful Feedback You've Ever Had in Your Career?

"Stop acting like you're the smartest person in the room, even if you are" and "You're right, but you're an asshole about it, and being an asshole trumps being right"

I was always late for stuff. CEO sat me down and said “I know you take this seriously but only I know that. Everyone else thinks you don’t give a shit because you’re never on time”