This section is from the book "A Compend Of The Principles Of Homoeopathy", by William Boericke. Also available from Amazon: A Compend of the Principles of Homoeopathy as Taught by Hahnemann.
Homoeopathy consists essentially in the application of the principle of similars. Drug selection alone constitutes Homoeopathy. The homoeopathic physician has to deal with two sets of phenomena in treating disease. On the one hand the patient, with a certain train of morbid symptoms; on the other, similar symptoms known to be produced in the healthy by some drug. The closer this correspondence in its essential features, the more certain and speedy the cure, on the principle that two like and similar forces may neutralize each other. This necessitates consideration of -
1. The examination of the patient, and the record of his symptoms.
2. The selection of the remedy corresponding to this totality of symptoms.
3. The administration of the single remedy.
4. The dose and its repetition.