But, says man, the Babel fish is a dead giveaway, isn't it? It proves you exist, and so therefore you don't. Q.E.D.
8 seconds sound clip from The Hitchhiker's Guide to the Galaxy (1981) - Episode 1 sitcom.
You can hear this line at 00:29:16.985 in the Blu-ray version of the episode.
Quote context
[...]
- The speech you hear decodes the brainwave matrix.
- The argument runs something like this.
- I refuse to prove that I exist, says God, for proof denies faith, and without faith I am nothing.
- Oh dear, says God, I hadn't thought of that, and promptly vanishes in a puff of logic.
- Most leading theologians claim that this argument is a load of dingo's kidneys.
[...]