The word homeopathy is derived from the Greek words homoios (similar) and pathos (suffering), which dates back to Hippocrates (460-377 BC)
Homeopathy is based on the principle of "like cures like": a substance can cure a disease if it has the ability to produce symptoms similar to those of the disease in a healthy person. For example, many of us have experienced the sensations of drinking too much coffe. The homeopathic remedy made from coffee (coffea cruda) has sensations of one being excited and over-sensitive; sleeplessness on account of excessive excitability of the mind and body; heightened acuteness of all the senses; and insomnia to name just a few. Thus, someone experiencing these such similar symptoms may benefit from the remedy coffea cruda.
"The holistic nature of homeopathy means each person is treated as a unique individual and their body, mind, spirit and emotions are all considered in the management and prevention of disease. Taking all these factors into account a homeopath will select the most appropriate medicine based on the individual's specific symptoms and personal level of health to stimulate their own body's healing ability." (1)
Homeopathy uses natural substances in micro-doses (nano-doses) made through a series of dilution and agitation. This original plant, mineral or animal substance is diluted in water and then shaken rigorously after each dilution. This process is done repeatedly, sometimes hundreds or thousands of times, resulting in a highly diluted and energetically potent remedy. Once the remedial substance has been diluted enough times, any toxicity in the original substance becomes minimized and the curative property comes to the fore.
Nobel Prize-winning virologist Dr. Luc Montagnier stated in an interview published in Science magazine December 24, 2010:
"I can't say that homeopathy is right for everything. What I can say now is that the high dilutions are right. High dilutions of something are not nothing. They are water structures which mimic the original molecules."
Dr. Montagnier's research was working with DNA dilutions of 10^-18; at which "you can calculate that there is not a single molecule of DNA left; and yet we detect a signal."
Please follow this link to read more about this - Source: Huffington Post
The principle of "like treats like" dates back to Hippocrates (460-377BC). The current form of homeopathy was formulated by the German physician Dr. Samuel Hahnemann (1755-1843).
Hahnemann was looking for a way to reduce the damaging side effects associated with the medical treatment of his day. He began by experimenting on himself, family and healthy friends and colleagues; giving them smaller and smaller medicinal doses of the poisons used in treatment. He discovered that as well as reducing toxicity, the medicines became more effective as the doses were lowered.
He also observed that symptoms caused by the toxic 'medicines' of his time, such as mercury for syphilis treatment, were similar to those of the diseases they were being used to treat.
Hahnemann went on to document his work, and his texts formed the foundations of homeopathic medicine as it is practiced today.