We do indeed find that a good deal of what the Americans have developed represents a primitive form of the exercises by which a spiritual vision is attained. Thus, we find Americans repeatedly commending self-control, self-discipline, self-education as all-important: what matters is not having learned something, but implanting it in your will by the constant repetition of a given exercise.
Source: Rudolf Steiner – GA 83 – The Tension Between East and West Prospects of its Solution (Europe-America) – Vienna, 10th June 1922
Translated by B.A. Rowley