Lecture VI
The need for greater subtlety of thinking is evident in all spheres of life. We shall not progress unless thinking becomes more alive and mobile so that it will cease to cling to crude externalities. There never have been more obstacles to making thinking more alive. For that very reason it is all the more necessary to promote science of one spirit. Only by working with subtler concepts does thinking become active and mobile. Through their very nature, the concepts of spiritual science have the power to strengthen the human I. What is longed for today may be satisfied by other means. But only spiritual science can give the human being real inner strength by awakening in him lucid concepts that are not so readily available, concepts which, just because they do not depict life's external aspects, make us inwardly strong, which means capable of recognizing the reality, the essence of things.