In this lecture, Kent discusses the true nature of disease and healing from a homoeopathic and philosophical standpoint. He begins by emphasizing that disease is not something material or structural in nature. Instead, it is a dynamic, invisible disturbance in the vital force, which cannot be observed by dissection or found in dead matter. The vital force, being spiritual, is the true source of both health and disease. Kent criticizes the materialistic medical view that treats disease as something that must be mechanically removed from the body, arguing that such views reduce the patient to a machine rather than a living being governed by immaterial laws.
He explains that health is a harmonious action of the vital force, and disease is a disturbance in this force. This disturbed state is what produces symptoms, and these symptoms are the only visible expression of disease. Hence, physicians must focus on observing symptoms accurately, as they are the only true guide to the inner disorder. Kent then emphasizes the role of the simple substance or immaterial vital principle, which animates the material body. Without it, the body is lifeless. Any disorder in this substance leads to disease.
Further, Kent highlights that our task as homoeopaths is not to seek pathology or structural causes but to observe the dynamic expressions of the disturbed vital force. Disease originates in the invisible realm, and hence, must be addressed through dynamic medicines — potentized remedies — that act on the same plane. He praises Hahnemann for his discovery of the Law of Similars and for aligning his philosophy with Divine Providence. Hahnemann’s moral conviction that God would not allow children to suffer from poisonous drugs led him to search for a better, natural law — which he eventually discovered through careful observation and experimentation.
Kent also points out that only those who believe in a divine and orderly universe can truly understand homoeopathy. Without such belief, practitioners fall into materialism, random experimentation, and lose sight of purpose and principle. As students, Kent urges a deep, lifelong study of the Organon, for its truths unfold over time and become more meaningful as clinical experience grows.
In §15, Kent reinforces the concept of man as a unit, both in health and disease. Whether disturbed by a natural disease or a drug-induced one, the person remains a unified whole affected by one dynamic influence at a time. He introduces the threefold study in homoeopathy: man in his healthy state, in his diseased state from natural causes, and in his diseased state from drugs (artificial disease). Similarly, remedies should be studied first as individual units, not in comparison. Only once a remedy is thoroughly understood should one proceed to compare it with others. Kent warns against premature comparative study in Materia Medica, sharing that his earlier teaching mistakes taught him to always begin with the unit — whether remedy or disease — and then proceed to comparison and individualization. Finally, he connects this approach to Hahnemann’s classical method, advocating for a systematic, principle-governed study that leads to accurate and intelligent homoeopathic practice.