When an opinionated person starts to challenge something, his mind shuts out all that could clear up the matter. The argument irritates him, however just it might be, and it seems that he is afraid of discovering the truth.
The conversation of those who like to lord it over us is very disagreeable. But we should always be ready to graciously acknowledge the truth, no matter in what guise it comes to us.
Study and research into truth often only serves to make us see by experience our natural ignorance.