There is something about having a mentor who can kick your butt. It takes humility to even have one. They keep you in check and keep you humble. I’ll even go so far to say that it isn’t really possible to be humble if you do not have one. There’s just something about having someone that is not afraid to mentor you that can be so humbling. And that’s assuming that humility is something that you’re interested in pursuing. Having a mentor helps.
Ask all the not humble people in your life if they have a mentor. Let me know what they say.