To know, is to know that you know nothing. That is the meaning of true knowledge
Socrates
One of the best things I like about Socrates was the fact that he always accepted that he knew nothing even when men were still swept off-feet with his high level of wisdom.
It is pathetic when you see people that know very little or nothing about a particular topic but they will always be looking for a way to be a heard, for me, that is pride at its peak of display. You see them argue even with people that are authorities in that field because they just want to make a point without even thinking if that point they want to make will be valuable or not.
Proud people will never want to open up to learn more because to them, they know everything already.