One observation I've made over time is that arrogance is, often, a mark of inexperience.
I've observed this in myself as well as countless others - on way up the learning curve you think yourself an expert and become arrogant about it right before you realise that in fact the computing industry (and probably applies to many other industries too) is so complex that it's likely impossible for a single person to understand everything.
Thus, for some people, a good way to combat arrogance is to gently teach them things they don't know - which will hopefully lead them to understand that we all have much to learn. It certainly worked for me.
I've observed this in myself as well as countless others - on way up the learning curve you think yourself an expert and become arrogant about it right before you realise that in fact the computing industry (and probably applies to many other industries too) is so complex that it's likely impossible for a single person to understand everything.
Thus, for some people, a good way to combat arrogance is to gently teach them things they don't know - which will hopefully lead them to understand that we all have much to learn. It certainly worked for me.