Battlestar Galactica, Season 4

Caprica-Six:
I want the pain. It's how I learn. I was instrumental in the destruction of humanity, but at the same time I learned, because...because I fell in love...with a human man, and he was mortal and fallible. And he had this incredible pride in himself. He thought he knew everything there was to know. And I loved him, with my whole heart. And then one day, I realized I wouldn't have him forever. I understood what I'd done. How I betrayed him and humanity. And that pain taught me to understand death. Baltar could die. And I loved him. Baltar's heart was ephemeral. Baltar's body was fragile in my hands.