I. Natural Science and Its Boundaries

I have spoken to you about the conception underlying my Philosophy of Spiritual Activity. This book is a modest but real attempt to achieve pure thinking, that pure thinking in which the Ego can live and maintain a firm footing. Then, when this pure thinking has been achieved, we can endeavour to do something else. This thinking that is now left in the power of the Ego, the Ego which now feels itself a free and independent spiritual being—this pure thinking can then be achieved from the process of perception, and whereas in ordinary life we see colour, let us say, and at the same time imbue the perception with the mental concept, we can now lift the concepts away from the process of elaborating the perceptions and draw the perceptions themselves directly into our bodily constitution.