Deterrence is the art of producing in the mind of the enemy the fear to attack.

— Group Captain Lionel Mandrake, President Merkin Muffley, Dr. Strangelove (Peter Sellers)

9 seconds sound clip from the Dr. Strangelove movie soundboard.

You can hear this line at 00:52:17 in the Blu-ray version of the movie.

Quote context

[...]

- Mr. President, the technology required is easily within the means of even the smallest nuclear power.

- It requires only the will to do so.

- But how is it possible for this thing to be triggered automatically and at the same time, impossible to untrigger?

- Mr. President, it is not only possible, it is essential.

- That is the whole idea of this machine, you know.

- Deterrence is the art of producing in the mind of the enemy the fear to attack.

- And so, because of the automated and irrevocable decision-making process which rules out human meddling, the Doomsday Machine is terrifying.

- Yes, and simple to understand. And completely credible and convincing.

- Gee, I wish we had one of them Doomsday Machines, Stainsey.

- But this is fantastic, Strangelove.

[...]