V. Can a method of gaining insight into spheres beyond the sense-perceptible world be given a scientific basis?

Again we have a surprising result, but a result that can present itself to the soul in sensory experience as clearly as do the plant cells which a botanist sees so clearly as he studies them under the microscope. It is, however, an unusual experience which we then have in our thinking. This inner experience, the inner state of soul which we gain when we strengthen our thinking, can only be compared to the sensation of hunger. This may sound strange and surprising, but it may be compared to a feeling of hunger, though it does not show itself in the way hunger does when we are in need of nourishment. It is a feeling which is above all limited to the human head organization. But it is only this which will show us how the human bodily organization relates to thinking. Anyone who does not have this experience may have all kinds of strange ideas about the way human thinking relates to the human body. Someone who does have it will never say: ‘This human body produces thinking,’ for—and the fact is evident—this human body does not have the impulses in its generative powers that give rise to thinking. Destructive processes happen in the body when we think, as destructive, I would say, as those which happen when we get hungry and body substance is broken down and destroyed. It has thus been rather strange that people whose thinking is more or less materialistic or mechanistic have arrived at the idea that the body gives rise to our thinking. It no more gives rise to it than do the powers that are its generative powers, powers that constitute the human being. If thinking is to happen, therefore, destruction must happen, as in the case of hunger.