Yeah, it's from Milton's Paradise lost, here's the whole of that "part". It comes fairly early on if you ever read the whole thing ...
"The mind is it's own place
And in itself can make a
Hell of heaven, a Heaven of Hell.
What matter where if I be still the same,
And all but less than he
Whom thunder hath made greater?

In this place we shall be free,
The Almighty hath not build
Here for his envy shall not drive us hence.
Here we may reign secure and in my choice:
To reign is worth ambition, though in Hell;
Tis better to reign in Hell, than serve in Heaven."

If Melissa is reading this could I just say that you're so lucky to be dating Brandon Iron. Brandon rules. I've been watching his stuff since the original Slap Happy days and ... wow ... he's replaced Rocco as my favourite male porn star.

JOHN