"Listening to others, especially those with whom we disagree, tests our own ideas and beliefs. It forces us to recognize, with humility, that we don't have a monopoly on the truth."

Next Quote

If you are offended by reading views that disagree with yours, then yes, you will be offended. However, it is not gratuitously offensive, it simply puts an argument, and if your views are strong enough, as I believe they are, you will be able to defend your views. You will not say, "Oh, it's offensive, it's offensive." You will say "No, you are wrong here and you are wrong here," and that's what you should do.

— Richard Dawkins