Since Lenger's detection of magnetic photons in homeopathic remedies by magnetic resonance the mystery of homeopathy comes to a solution. Homeopathy is a regulation therapy curing hypo-and hyper-functions of pathological pathways. It reacts according to the principle of resonance. The fundamental principles of homeopathy as proving, symptom picture, curing according to the Law of Similars and the production of homeopathic remedies over the Avogadro number by repeated dilution and succussion are explained to have the same frequencies so that the resonance principle can work. Pathological pathways are cured by using their highly potentized substrates, inhibitors and enzymes, given daily or each second day. This is in contradiction to the normal applied homeopathy. The efficacy of homeopathy now has a scientific base and is completely explained by applying biochemical and biophysical laws.