"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you.
~Friedrich Nietzsche, philosopher (1844-1900)

This makes me think of "the Beast." Namely, depression. I've fought with it so long, how do I know who is me and who is depression? Sometimes I wonder which thoughts are truly mine and which are thoughts manipulated by the Beast.