So what point does "Zarathustra" make, say, in comparison with "Discipline and Punish"? I think both authors have published a broad spectrum of works, ranging from "accessible, rational" to "confusing". Both are suitable for having catchy citations ripped out of their context.

"He who does battle with monsters needs to watch out lest he in the process become a monster himself. And if you stare too long into the abyss, the abyss will stare right back at you." (Friedrich Nietzsche, Jenseits von Gut und Böse)