“The time will come – and it may not be far off – when quite different tendencies will come up at a congress like the one held in 1912 and people will say: It is pathological for people to even think in terms of spirit and soul.
‘Sound’ people will speak of nothing but the body. It will be considered a sign of illness for anyone to arrive at the idea of any such thing as a spirit or a soul. People who think like that will be considered to be sick and – you can be quite sure of it – a medicine will be found for this. . . .
The soul will be made non-existent with the aid of a drug. Taking a ‘sound point of view’, people will invent a vaccine to influence the organism as early as possible, preferably as soon as it is born, so that this human body never even gets the idea that there is a soul and spirit.”,
Rudolf Steiner, 7 October 1917.