SPOILER ALERT! Here is my take on good vs evil from True Detective season 1:

Rust: “I tell you Marty I been up in that room looking out those windows every night here just thinking, it’s just one story. The oldest.”

"Marty: “What’s that?”

Rust: “Light versus dark.”

Marty: “Well, I know we ain’t in Alaska, but it appears to me that the dark has a lot more territory.”

Rust: “Yeah, you’re right about that.”

Rust insists that Marty help him leave the hospital, and Marty agrees. As they head to the car, Rust makes one final point to his former partner.

Rust: “You’re looking at it wrong, the sky thing.”

Marty: “How’s that?”

Rust: “Well, once there was only dark. You ask me, the light’s winning.”"