Paths to Knowledge of Higher Worlds

For the attainment of its task, the spiritual science of Anthroposophy must deviate from this way of thinking which is entirely directed towards the objective reality outside. Anthroposophy must above all strengthen and intensify thought within the human being. In the public lecture which I gave yesterday I remarked that a muscle grows stronger if it does a certain work and that the same applies to the forces of the soul. When certain definite concepts which can easily be surveyed are again and again set at the centre of our consciousness by systematic practice, so that we completely surrender to such concepts, our thinking power grows stronger.