Homeopathy is not only a science but an art. It requires a great skill on the part of the physician to take a case, compare the symptoms of the patient with those of the medicine and finally select a similimum(medicine most similar to the patients symptoms). For this he has to follow three main fundamental principles of Homeopathy which include:

Law of Similars: As mentioned earlier Homeopathy is based on therapeutic law “Similia Similibus Curentur” i.e. ‘let likes be cured by likes’. In this art of healing the medicine given to a diseased person possesses the power to produce that similar disease in a healthy person. Hence the symptoms of the diseased person are matched with the symptoms of the medicine (medicine are proven on healthy human beings, the symptoms so produced are noted down and recorded in Materia medica, which is  a compilation of proven homeopathic medicines) and depending on this principle (Law of similars) the most similar medicine (similimum) is given to the patient.

Law of Simplex: Every medicine possesses an inborn nature by which it can be differentiated from rest of the medicines. In Homeopathic drug proving the medicines are proved on healthy human beings singly and in simple form. Hence at a time only a single medicine must be given to the diseased person. As ideally medicines are not proved in combinations their effect are not known. Hence according to law of simplex a single medicine should be taken at a time.

Law of Minimum: During the state of disease a person is hypersensitive hence a very minute dose of medicine is required to arouse reaction in the body. If medicines are given in larger doses they can produce unnecessary side effects and organic damage. After repeated experiments Dr. Hahnemann came to the conclusion that only a minimum quantity of medicine is required in disease to get a desirable effect and bring about cure.

Other fundamental principles include:

Law of Vital force: Vital force (life principle) is a spirit like, dynamic power which enlivens the body. This force is responsible for the state of health and disease. A harmonious flow of this energy with a balance between mind and body ensures health. On the other hand any derangement in the harmonious flow of the vital force can give rise to abnormal sensations and functions in the body (i.e. symptoms and signs). Hence to recover the healthy state this deranged vital force is to be brought back to normal.

Individualization: According to Homeopathy no two people are alike, hence a disease affecting different individuals can also not be same. This means that a medicine can not be prescribed on the basis of disease name. Therefore every patient has to be individualized to get the unique symptom picture depending on which the medicine can be given. In other words we can say that there are no diseases but diseased individuals.

Drug proving: In order to use a drug for treatment its curative power must be known. A curative power of a drug is its ability to produce symptoms in a healthy person. This can be known by proving drugs(singly) on healthy human beings. The symptoms observed during drug proving are noted down and a record of these proven medicines is known as Materia Medica.

Potentization: Disease is caused by derangement of the vital force which is dynamic in nature. Hence the medicines used to cure disease must also be dynamic (as action and reaction between two things can occur only when they are in the same plane). Therefore drugs are potentized (homeopathic method of preparing medicines). Potentization is done by process of succussions and triturations whereby the quality of the medicine increases and the quantity of the medicine decreases. Every medicine possesses an inborn nature (curative power) which lies dormant within it. Potentization helps to release this dynamic curative power of the drug.

Direction of cure: According to Dr. Herring the homeopathic cure should take place from above downwardswithin outward andsymptoms must disappear in a reverse order of their appearance(i.e. the first symptom will be the last to disappear). If this direction is reversed its called suppression and not cure.