I knew I could never succeed on the principles of telepathy.

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

You can hear this line at 00:53:33.610 in the Blu-ray version of the movie.

Quote context

[...]

- Maybe you can help me to clear up this ghastly business.

- But no matter what you do to me, remember those horrible deaths were beyond my control.

- Go on, Professor.

- For many years now, I have been working on a theory of thought materialization. The entire apparatus to give it the required boost is in my laboratory.

- Laboratory? I didn't know you had one.

- There are many things you didn't know, my child. If you had, you'd never have come here again. You can see it later.

- I knew I could never succeed on the principles of telepathy.

- I needed to stimulate my brain to the extent that I could detach thought from my conscious to give it a separate entity of its own.

- I concentrated on the simplest experiment: To turn the page of a book.

- I designed an instrument to create a sudden and powerful electrical boost to help me free my thought.

- But each application of the electric charge created a shock almost equal to electrocution. It made me ill.

[...]