Quotes: Demon Slaying

Tell the harpies that land on your bed post
That at the count of five, you'll roast them alive
Tell the devil it's time you gave him his due
He should go back to hell, he should shake in his shoes
Cause the mightiest, scariest, creature is you
Voltaire, "Goodnight Demon Slayer"

Here's your story: Demons over there, kill they ass.
— Ben "Yahtzee" Croshaw, Zero Punctuation: Ninja Gaiden 2

The daemonic are without number, and their legions span the galaxy. But faith does not tire. Should it take us an eternity, the Ordo Malleus will find and exterminate them all.
Lord Hephaestos Grudd, Warhammer 40,000

Every moment that the daemon, the heretic, the traitor draw breath is another moment of defeat for us, the most faithful of His warriors.
Justicar Alaric, Grey Knights

I am the Hammer.
I am the Hate.
I am the woes of Daemonkind.
Battle Prayer of the Grey Knights, Warhammer 40,000'

Survivor: We're going to die here, aren't we?
Demon Hunter: No. Because as long as I'm here, they are the prey...and I am the hunter!
Diablo III Demon Hunter trailer

Like you said, humans are weak. We die easily. But no matter how weak we are, even if we're being chopped to bits or stabbed to death, we still want to live. I'm gonna give you a little taste of what it's like.
Guts, Berserk, about to finish off the Baron of Koka Castle.