Heck of a beard, Nestorius!
Heresies never die, because they’re the product of fallen human reason, which goes down the same paths over and over again, often with the best intentions. (Sometimes not, see the United States Congress.)
And each time a person reaches the same erroneous conclusion as myriads of others, he thinks he’s the first person to think of this brilliant idea. (See teenagers.)
I’m beginning to have a bit of respect for Cyril of Alexandria, despite his ambiguous relationship with the Hypatia episode.