It is not a matter of theories, but of the ways of thinking. The true practitioner is not concerned about anybody’s thoughts, but about the effects of the thoughts. That is the point. It does not matter so much whether one is an idealist or not, but it is significant for life that one has fertile thoughts which are active in such a way that life prospers and progresses. It is important to bear in mind that spiritual science, even in this direction, has nothing to do with dogma or any belief.
Anyone may espouse the most spiritual theories. It is not this which is important, but rather the fact that these thoughts are fertile if he introduces them in life. If one says that he is not a materialist, that he believes in the vital force, even in the spirit, but proceeds in the question of nutrition always as if the human being is a retort, his worldview cannot become fertile. Spiritual science has something to say about these concrete questions only if it itself is able to illuminate the details, and it is able to do so concerning the issues of nutrition and of health.
Source: Rudolf Steiner – Issues of Nutrition in the Light of Spiritual Science – Berlin, 17th December 1908
Painting by David Newbatt
The great Rudolf Steiner Quotes Site 