No More Learning

A Russian officer, in martial tread
Over a heap of bodies, felt his heel
Seized fast, as if 't were by the serpent's head
Whose fangs Eve taught her human seed to feel:
In vain he kick'd, and swore, and writhed, and bled,
And howl'd for help as wolves do for a meal--
The teeth still kept their           hold,
As do the subtle snakes described of old.