The First Book of Urizen

6. In fierce anguish & quenchless flames
To the desks and rocks he ran raging
To hide; but he could not: combining,
He dug mountains & hills in vast strength,
He piled them in incessant labour,
In howlings & pangs & fierce madness,
Long periods in burning fires labouring
Till hoary, and age-broke, and aged,
In despair and the shadows of death.