Of all the Beatitudes, I'd guess that "blessed are the meek for they shall inherit the earth" is the most misunderstood, mistrusted, and neglected. I think the reason why is because we don't understand the virtue of meekness and tend to think it indicates weakness.
Certainly, meekness didn't fit in with the values of the Greco-Roman world of the first century, where humility wasn't generally lauded as a virtue. Nietzsche, a great admirer of the Greeks, thought meekness was exactly the sort of false virtue that the weak would applaud because, well, it's about the only virtue they could actually pull off. Since the weak can't win by the standard rules, they change the rules.
I think most of us are far more Nietzschean than we'd like to admit. At least I am. When I hear the word meek, it seems too insipid, too accommodating, too spineless to be a virtue.