Supergirl, Season 3

Grace:
My mother used to always say that good would be rewarded with grace. But when I became a surgeon, I finally saw the truth. There is no reward for being good.

Kara:
Whatever is happening to you doesn't give you power over who lives. Only over who dies. You don't want that. [holds out her hand] We can stop it.

Grace:
[takes Kara's hand] Stop it. Why would I ever want to stop it? This is the greatest thing that's ever happened to me. I don't have to worry about saving anyone anymore because I don't want to. [shoves Kara's hand away]

Kara:
No.

Grace:
I get to choose who dies.

Kara:
Grace.

Grace:
They say that surgeons have a God complex, but it's simple. [speaks in Pestilence's voice] I. Am. A god!