“"Psychiatry" and "psychiatrist" are easily redefined to mean "an anti-social enemy of the people". This takes the kill crazy psychiatrist off the preferred list of professions … The redefinition of words is done by associating different emotions and symbols with the word than were intended… Scientologists are redefining "doctor", "Psychiatry" and "psychology" to mean "undesirable antisocial elements"… The way to redefine a word is to get the new definition repeated as often as possible. Thus it is necessary to redefine medicine, psychiatry and psychology downward and define Dianetics and Scientology upwards. This, so far as words are concerned, is the public opinion battle for belief in your definitions, and not those of the opposition. A consistent, repeated effort is the key to any success with this technique of propaganda.”

"Propaganda by Redefinition of Words" (5 October 1971).
Scientology Policy Letters