Austrian Quotes and aphorisms about must Sigmund Freud Sigmund Freud Arnold Schwarzenegger Arnold Schwarzenegger Arnold Schwarzenegger Rudolf Steiner Rudolf Steiner Rudolf Steiner ,, If spiritual science is to do the same for spirit that natural science has done for nature, it must... Rudolf Steiner Rudolf Steiner ,, What is of the nature of spirit and soul must be gleaned from facts belonging to the spirit and sou...