# IV. Body, Soul and Spirit

Man can only come to a true understanding of himself when he grasps clearly the significance of thinking within his being. The brain is the bodily instrument of thinking. A properly constructed eye serves us for seeing colors, and the suitably constructed brain serves us for thinking. The whole body of man is so formed that it receives its crown in the physical organ of the spirit, the brain. The construction of the human brain can only be understood by considering it in relation to its task—that of being the bodily basis for the thinking spirit. This is borne out by a comparative survey of the animal world. Among the amphibians the brain is small in comparison with the spinal cord; in mammals it is proportionately larger; in man it is largest in comparison with the rest of the body.

There are many prejudices prevalent regarding such statements about thinking as are presented here. Many people are inclined to under-value thinking and to place higher value on the warm life of feeling or emotion. Some even say it is not by sober thinking but by warmth of feeling and the immediate power of the emotions that we raise ourselves to higher knowledge. People who talk in this way are afraid they will blunt the feelings by clear thinking. This certainly does result from ordinary thinking that refers only to matters of utility. In the case of thoughts that lead to higher regions of existence, what happens is just the opposite. There is no feeling and no enthusiasm to be compared with the sentiments of warmth, beauty and exaltation that are enkindled through the pure, crystal-clear thoughts that refer to the higher worlds. The highest feelings are, as a matter of fact, not those that come of themselves, but those that are achieved by energetic and persevering thinking.

The human body is so constructed that it is adapted to thinking. The same materials and forces that are present in the mineral kingdom are so combined in the human body that thought can manifest itself by means of this combination. This mineral structure built up in accordance with its function will be called in the following pages the *physical body* of man.

Organized with reference to the brain as its central point, this mineral structure comes into existence by propagation and reaches its fully developed form through growth. Man shares propagation and growth in common with plants and animals. Through propagation and growth what is living differentiates itself from the lifeless mineral. Life gives rise to life by means of the germ. Descendant follows forefather from one living generation to another. The forces through which a mineral originates are directed upon the substances of which it is composed. A quartz crystal is formed through the forces inherent in the silicon and oxygen that are combined in the crystal. The forces that shape an oak tree must be sought for indirectly in the germ-cells of the mother and father plants. The form of the oak is preserved through propagation from forefather to descendent. Thus, there are inner determining conditions innate in living things, and it was a crude view of nature that held lower animals, even fishes, to have evolved out of mud. The form of the living passes itself on by means of heredity. How a living being develops depends on what father and mother it has sprung from—in other words, on the species to which it belongs. The materials it is composed of are continually changing but the species remains constant during life and is transmitted to the descendants. Therefore, it is the species that determines the combination of the materials. This force that determines species will here be called life-force. Mineral forces express themselves in crystals, and the formative life-force expresses itself in the species or forms of plant and animal life.