What Happens When Two Similar Diseases Meet? Aphorisms 43–51 Explanation

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In Organon of Medicine, Samuel Hahnemann explains a fundamental principle of Homoeopathy — Similia Similibus Curentur (Let likes be cured by likes).

Aphorisms 43–51 describe what happens when two similar diseases meet in the same organism.

I. Basic Principle

Condition:

When an organism is suffering from a natural disease, and another stronger and similar disease attacks it.

Effect:

  • Two similar diseases:
    • Do not repel each other
    • Do not suspend each other
    • Do not coexist together
    • Do not form a complex disease

Instead, the stronger similar disease annihilates (destroys) the weaker one.

II. Explanation of the Process

  1. The stronger disease is similar in symptoms.
  2. It affects exactly the same parts of the organism as the weaker disease.
  3. Since the same tissues are already occupied by the stronger force:
    • The weaker disease can no longer act.
    • It becomes extinguished.
  4. The vital force is now influenced only temporarily by the stronger disease.
  5. After its action is completed, recovery follows.

This is the natural law of cure.

III. Examples Given by Hahnemann

Hahnemann supported this law with clinical observations:

Smallpox

Smallpox has cured conditions like:

  • Ophthalmia
  • Amaurosis
  • Deafness
  • Dyspnea
  • Swelling of testicles
  • Dysentery
  • Cow-pox

Cow-pox

Cowpox cured:

  • Swollen half-paralyzed arm
  • Intermittent fever

Measles

Measles:

  • Prevented Whooping cough
  • Cured chronic herpetic eruptions
  • Cured miliary rash

These examples prove that a stronger similar disease removes a weaker one naturally.

IV. Natural Similar Diseases vs Artificial Medicinal Similar Diseases

A. Natural Similar Diseases

🔹 Very few natural diseases can act as remedies.
🔹 They are often dangerous and life-threatening.
🔹 The secondary disease itself may require treatment.
🔹 Their intensity cannot be controlled.
🔹 Hence, natural cure by similar disease is:

  • Uncertain
  • Risky
  • Dangerous

B. Artificial Medicinal Similar Diseases (Homoeopathic Medicines)

This is the great discovery of Hahnemann.

Advantages:

  1. Thousands of homoeopathic medicines are available.
  2. They produce artificial diseases similar to natural ones.
  3. Their strength can be controlled by dose and potency.
  4. After completing their action, they disappear spontaneously.
  5. Cure is:
    • Gentle
    • Rapid
    • Permanent
    • Harmless

The medicinal disease must be:

  • Similar in symptoms
  • Slightly stronger than the natural disease

This ensures true homoeopathic cure.

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