I have to offer another quote. Sorry, I've been reading GK Chesterton and I just love this guy. I'll try to supply the context after,
"...the modern man fancies he has reached supreme culture because he opens his intellect...There is one odd aspect of the man with this sort of open mind...it is that being thus gaping and helpless, he is really brutal and oppressive. he tyrannises; he forces on all other men his own insolent indecision. He forbids his followers to come to any conclusion till he has done so. He will allow no one else to find the truth...He is the worst tyrant that the world has seen; he is the persecuting sceptic. He is the man who has held up the whole world now for over a hudred years." (London Times Oct 16, 1909)
His point is very simple. One who tries to forever remain an 'open mind' is one who can never actually come to a decision. For example to be open-minded when it comes to say abortion, or euthenasia, or Reformed theology really means to never actually believe anything definitive about it. Once you do you become 'closed-minded.' And the one who demands others maintain an open mind really demands indecisiveness upon others. To maintain an open mind is to never close down on an idea, or theology, or viewpoint. It really is to detach yourself from the world of thought. Isn't it interesting that the ebbing flow of culture has taken something so compassionate sounding 'open mindedness' to mask something so bland and boring and dangerous as detachment?
As a side note --read GK Chesterton, you'll love him (probably)!