From "Buffy the Vampire Slayer: Who Are You? (#4.16)"
I have a gift no man has, no demon has ever had. I know why I'm here. I was created to kill, to extinguish life wherever I find it, and I have accepted that responsibility. You have lived in fear and desperation because you didn't have that gift. But it's time to face your fear.
Tell us what to do.
You are here to be my first. To let them know that I am coming.