Doctor Who's Science of Miracles?

Here's Jon Pertwee's Doctor on the subject of psychokinetic energy.

DOCTOR: Well the emotions of a group of ordinary human beings generate a tremendous charge of psychokinetic energy. This the Master channels for his own purpose.
MISS HAWTHORNE: But that is magic - that’s precisely what black magic is!
DOCTOR: No, Miss Hawthorne, I’m afraid not.
MISS HAWTHORNE: Are you trying to tell me that the invocations, the...the rituals, even the sabbat itself are just so much window dressing?
DOCTOR: No, no, no, of course not. No, they are essential to generate and control the physonic forces - and to control the Dæmon himself.

[Guy Leopold, Doctor Who: The Dæmons, 'Episode Five']

Funny, the things that stick in one's mind!