How difficult it is for a person to push away intruding thoughts time and again. Often thoughts keep on intruding – especially the unpleasant ones – for days on end. One cannot get rid them. It gets even more difficult once we have taught ourselves to concentrate our thoughts. The thought content on which we have concentrated, takes hold of us and we need to summon up tremendous effort to eliminate it again.
Source (German): Rudolf Steiner – GA 305 – Spiritual Ground of Education – Oxford, 20 August 1922
Translated by Nesta Carsten-Krüger