Knowledge makes people humble
Arrogance makes people ignorant.
There's some fine lines in there... and defending the truth against attack, or minorities against bullies, isn't a lack of humility. (Or may not be). While conceding, giving up an argument or being deferential while not really considering the points or being willing to change ones mind, or think about what they other side is saying, is supreme arrogance. So what something appears to be, versus what it is, can be polar opposites.
Examples of Humility and what it means.
Examples of Humility and what it means. more...