10. The Supernatural Essence of Man and the Development of Humanity
The natural scientist is right to speak of certain limits to his knowledge of nature. And it is precisely the most cautious natural scientists who have said that natural science always leads people to concepts and ideas that cannot be taken further in the study of nature. Hasty people then speak of such limits as a restriction of human knowledge in general. The cautious natural scientist knows that he cannot go beyond these limits with natural research alone. He will therefore, as long as he remains a natural scientist, stop at these limits; let us say, at such concepts that present themselves to natural research as unbridgeable gaps, such as the essence of matter, the essence of force, and many others; the natural scientist stops there. The spiritual researcher cannot do that. The spiritual researcher begins his work precisely where the natural scientist must stop, by fighting out inner struggles with what is the limit of natural science. The whole inner life of the soul must be brought into activity. And while the natural scientist stops at such limits, the spiritual researcher begins to find his way vividly into ideas and concepts and perceptions and feelings of such limits. Then he experiences something by delving ever deeper into that which science cannot or should not say anything about; then he senses what it actually means to live with the limits of natural knowledge.