"The mind is its own place, and in itself can make a Heaven or Hell, a Hell of Heaven...to reign is worth ambition, though in Hell: Better to reign in Hell than serve in Heaven."
- Lucifer speaking to Azazel and Mammon, Paradise Lost, Book 1, vs. 254-55, 263 (John Milton)
Though not scriptural, I believe that Milton describes Lucifer's mentality well in Paradise Lost. The context of the quote comes from Lucifer and his minions' debates about whether to wage war on Heaven, from where they had just been cast out. They eventually determine that war will be necessary, but decide that the best way to figure out how is to send Lucifer to see God's new creation, Man, and see how to deceive him before war is waged.
Surely Lucifer really has this mentality, that it is better to be the master of the underworld than to serve the Lord. He is also correct, that Heaven and Hell depend on us in our own minds. Our living closer to the commandments can make our mind a Heaven. And that is not fiction.