Movies:
Apocalypse Now

Marlon Brando: "Are you an assassin?"

Martin Sheen: "...I'm a soldier."

Brando: "You're neither... You're an errand boy... sent by grocery clerks... to collect a bill."

G.D. Spradlin: "There's a conflict in every human heart... between the rational and irrational... between good and evil... and good does not always triumph. Sometimes the dark side overcomes what Lincoln called 'the better angels of our nature.' "

Harrison Ford: "You understand, Captain, that this mission does not exist... nor will it ever exist."

Marlon Brando: "Horror... and moral terror... are your friends."

Marlon Brando: (whispering) "The horror! ... The horror...!"

Marlon Brando: "What did they tell you?"

Martin Sheen: "They told me that you had gone totally insane.. and, uh, that your methods were... unsound."

Brando: "...Are my methods unsound?"

Sheen: "...I don't see any method at all, Sir."

G.D. Spradlin: "His, uh... ideas... methods... became... unsound."

Martin Sheen: "Everyone gets everything he wants... I wanted a mission... And for my sins, they gave me one."

Robert Duvall: "Smell that?... Do you smell that?"

Sam Bottoms: "What."

Duvall: "Napalm, son. Nothing else in the world smells like that... I love the smell of napalm in the morning... Ya know, that gasoline smell... It smells like... victory."

Jerry Ziesmer: "Terminate... with extreme prejudice."