On open-mindedness:

"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

"I believe in an open mind, but not so open that your brains fall out." - Arthur Hays Sulzberger

"A diplomat is a man who says you have an open mind, instead of telling you that you have a hole in the head." - Unknown

"A great many open minds should be closed for repairs." - Toledo Blade