Although I favor the open mind, I certainly do not advocate that the mind should be so open that the brains fall out.
~Arthur Hays Sulzberger (among others) — New York Times publisher from 1935-1961 from “Freedom of Information” 

I tell you this
to break your heart,
by which I mean only
that it break open and never close again
to the rest of the world.
— Mary Oliver from New and Selected Poems, Volume Two

Few things are as condemning in this day and age than being accused of being closed-minded.  In religion and politics, the most zealous liberals and hard-core conservatives are the least likely to see another point of view, much less tolerate it. They are more than willing to “cancel” anyone who might be bold enough to express another perspective.

On the one hand, when unwilling to consider a differing opinion or world view, it becomes impossible to admit one could be a little bit misinformed or just plain wrong. Some hard-heads are locked so tight because they have intentionally lost the key to ever risk being open.

On the other hand, I know those who are so open-minded, there is nothing left but blank space because common sense has spilled out — whatever feels right, anything goes, no judgment, no boundaries, no barriers, all doors and windows flung ajar with “liberating” breezes coming and going.

It is a terribly empty void to behold when one’s brains have fallen out.

As for me, moderate middle-of-the-road person that I am, I tend to keep a protective helmet on but listen for the knock on the door of my convictions and opinions to see who or what may be there, remaining receptive to some possibility other than what I think I know.

All in all, we should prefer open-hearted over open- or closed-minded.  Although far costlier, Love spilled from a broken Incarnate Heart and flooded the world with undeserved Grace. It will never be closed again.