The brain itself is an electrical machine. It's nothing but a machine. When it malfunctions, a blow to the head, for example, then the brain produces useless excess currents. These excess currents are our dreams and delusions.
19 seconds sound clip from the Return to Oz movie soundboard.
You can hear this line at 00:10:39.147 in the Blu-ray version of the movie.
Quote context
[...]
- But what's this? Dorothy? Why, it's his tongue! Isn't it?
- No, no! It just manages electrical current.
- Now, your aunt already knows that we are at the dawn of a new age.
- Now we have the means to control these excess currents.
- Yes.
- I must get back to Henry before nightfall. You understand, don't you?
- Here's your lunch pail. I was thinking we'd only stay a short time.
- That won't be necessary. We have excellent meals here.
[...]