Harmful to mankind

Care must be taken that a certain knowledge is not placed at the service of one part of mankind, but at the service of mankind as a whole. As soon as man does not permeate the best knowledge with this sentiment it will become harmful to mankind.

Source: Rudolf Steiner – GA 181 – Anthroposophical Life Gifts: Lecture IV: The Eternal and the Imperishable – Berlin, 9th April 1918