
Since the French Revolution the influence of woman in Europe has DECLINED in proportion as she has increased her rights and claims; and the "emancipation of woman," insofar as it is desired and demanded by women themselves (and not only by masculine shallow-pates), thus proves to be a remarkable symptom of the increased weakening and deadening of the most womanly instincts.
"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)
Taking the Nietzsche quote[1] into the context of his work: "Jenseits von Gut und Böse (Viertes Hauptstück; Sprüche und Zwischenspiele, 146)" [Beyond Good and Evil; Fourth main part; Proverbs and interludes; 146]] your interpretation seems more in line with the book.
The inevitability of birthing/becoming a Monster oneself by fighting a Monster for too long is akin to staring into the abyss long enough until the abyss is staring into you. Melting away of cause and effect, the blurring, the reversing and finally the interchangeability/permeability - in this case - of the line between the object and observer (objectivism).
Nihilism (dissolution of all values, meaningless-ism) as a standpoint devours its subject who in the beginning is looking at the outside world all around - from the inside out in the end.
[0]https://en.m.wikipedia.org/wiki/Devil%27s_advocate
[1]http://www.zeno.org/Philosophie/M/Nietzsche,+Friedrich/Jense...
146 Wer mit Ungeheuern kämpft, mag zusehn, daß er nicht dabei zum Ungeheuer wird. Und wenn du lange in einen Abgrund blickst, blickt der Abgrund auch in dich hinein.
"Not that you lied to me, it's that I don't believe you anymore that have shocked me." (Beyond Good and Evil, 1886)