Conscience. What a thing. If you got a conscience, it'll pester you to death. But if you don't believe you got one, what can it do to you?

Fred C. Dobbs (Humphrey Bogart)

14 seconds sound clip from the The Treasure of the Sierra Madre movie soundboard.

You can hear this line at 01:39:16.965 in the Blu-ray version of the movie.

Quote context

[...]

(Two gunshots)

- Maybe I didn't kill him. Maybe he just staggered and fell down without being hit.

- You keep it. It's yours, anyhow.

- No, no. No, they won't find him. I'll dig a hole for him first thing in the morning.

- This fire don't... don't give much heat.

- Conscience. What a thing. If you got a conscience, it'll pester you to death. But if you don't believe you got one, what can it do to you?

- Makes me sick, all this talking and fussing about nonsense.

- Nacho, ven a ayudarme.

- ¿Que le Paso, señor?

- Ayudame a llevarlo a mi choza.

- Maybe I better leave him like he is. Ain't very likely anybody will find him. In a week's time, the buzzards and the ants will have done away with him anyway.

[...]