My best friend Bird opines on eternal security.
He uses the Baptisty language of "once saved, always saved." I like the Calvinisty "perseverance of the saints" better. Tomato, to-mah-to.
Either way, this is one theological issue that carries a real weight -- frequently by lifting a millstone.
For those who question whether doctrine can be meaningful, I'd propose eternal security as a crucial issue in pastoral theology.