Which way I fly is hell; myself am hell;

And in the lowest depth a lower deep

Still threat’ning to devour me opens wide,

To which the hell I suffer seems a Heav’n.

John Milton, Paradise Lost

I could not help feeling that they were evil things—mountains of madness whose farther slopes looked out over some accursed ultimate abyss.

H.P. Lovecraft, At the Mountains of Madness