An Occult Physiology

Human self-knowledge requires reverence before the divine nature of humanity, understood as a revelation of the World Spirit. The lecture establishes that external observation reveals a fundamental duality in human form—the brain and spinal cord enclosed in protective bone, and the remaining body—and that the brain represents a transformed, evolved spinal cord whose earlier form remains active during dreams, generating pictures rather than actions. Occult perception reveals this anatomical duality reflected in the aura's distinctive coloration: lilac-blue around the brain and greenish tones at the spine's lower portions.

The human organism exhibits a fundamental duality: the upper system (brain and nerves) receives external impressions through the senses, while the lower system (liver, spleen, gallbladder) represents an internalized cosmos that works upon the blood from within. Through disciplined inner concentration, one can separate the nerve-system from the blood-system, enabling direct experience of supersensible worlds normally inaccessible to ordinary consciousness.

The human organism operates through two complementary nerve systems: the cerebrospinal system mediates external sense impressions to the blood, while the sympathetic system conveys the inner life of organs (liver, spleen, gall-bladder) to the blood as an internalized world. Through occult exercises, one can either free the cerebrospinal nerves from blood to perceive the spiritual world, or deepen mystical immersion by pressing the blood into the sympathetic system to experience one's inner divine nature. The spleen exemplifies this duality as a "transformer" organ that rhythmically harmonizes the irregular intake of nourishment with the blood's regular circulation—a saturnine function of isolation and individuation that mirrors how Saturn forces separate and regulate the solar system itself.

The human organism contains a microcosmic system mirroring the macrocosm, with the heart and blood serving as the ego's instrument at the center. The spleen, liver, and gallbladder transform external food by neutralizing its inherent laws, while the lungs and kidneys balance these forces with direct cosmic contact through air and oxygen. Memory-formation occurs through opposing ether-currents in the brain, physically expressed in the pineal and pituitary glands, revealing how soul-life and physical body interpenetrate.

Organs function as supersensible force-systems that attract and organize physical matter according to their etheric, astral, and ego-determined natures, with the sympathetic nervous system crucially preventing inner organic processes from reaching consciousness while the cerebrospinal nervous system conveys external impressions to the blood. Excretion and secretion enable self-awareness by creating resistance within the organism, allowing the human being to experience its own inner life as distinct from the external world, while the skin represents the outermost boundary where formative forces enclose themselves to establish human form and individuality.

Blood serves as the ego's most immediate and responsive physical instrument, capable of expressing every inner experience through its mobility, while the skeletal system represents the opposite pole—a fixed, ancient structure withdrawn from ego influence except through the formative forces carried over from previous incarnations, as evidenced in the individual configuration of the human skull.

Conscious soul-processes—thinking, feeling, and willing—manifest as corresponding physical processes in the organism: thought as salt-deposition, feeling as fluid coagulation, and will as warmth-generation. The blood serves as the central instrument mediating between the unconscious ego-organization anchored in the skeletal system and the conscious astral body's life of soul, while the sympathetic nervous system protects deeper organic processes from consciousness by filtering their influences upward.

The human organism represents a unified system where supersensible form-principles organize nutritive matter through coordinated action of the ether-body, astral body, and ego across seven inner organs that mirror the cosmic order. These organs—liver, gallbladder, spleen, heart, lungs, and kidneys—metamorphose the nutritional stream while maintaining consciousness through secretory processes and the blood's circulation, establishing a dynamic equilibrium between inner vital activities and the external world. The organism's evolutionary design reveals ascending and descending processes simultaneously present in the germ-layers, with each system representing transformations of earlier states that continue developing throughout human life.