"The trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it."
-- Terry Pratchett, "Diggers"

It's hubris to think that you already know everything that there is to know, so it's important to be open-minded about new ideas. But that doesn't mean that you have to agree with or incorporate them. People can be still be wrong, after all, even in this enlightened age.