All of my notes about its creation and how I thought it could be controlled were destroyed.

5 seconds sound clip from the Fiend Without a Face (1958) movie soundboard.

You can hear this line at 00:57:27.044 in the Blu-ray version of the movie.

Quote context

[...]

- I was able to detach my thoughts and allow them to work on their own.

- I began to devise a being into which the thought, once released, could enter and preserve itself for all humanity.

- I envisaged something akin to the human brain with life and mobility, but without the limitations of man's body.

- I concentrated my entire thought on its creation. I succeeded! But, like thought itself, it was invisible.

- That night I entered my laboratory to take advantage of a radar test only to find the place in shambles, my equipment wrecked beyond repair.

- All of my notes about its creation and how I thought it could be controlled were destroyed.

- I knew now that I had created a fiend. There was no other explanation.

- I was helpless, but whom could I tell? Who would believe such a fantastic story?

- I could sense the presence of the fiend there in the room with me, growing more powerful with each succeeding day.

- My one desire was to destroy the thing, but I possessed no means of projecting my thought to do so.

[...]