<p>Homeopathy is a tried therapeutic method dating back over 200 years. However, most classical homeopaths are unable to verify the effectiveness of their practice. A resonant response must be identified.</p><p>Classical repertorisation involves attempting to find a suitable ‘remedy’ from among over 2000 substances that is intended to cure the patient. This remedy is supposed to be the ‘similimum’ — the substance most like the patient’s overall symptoms, with which it resonates. If this resonance does not occur, the whole thing is merely a placebo. The potency of the similimum is also crucial. Therefore, the homeopath needs a control system to be able to verify their work. The electromagnetic field (EMF) or the (electromagnetic emanation of the body, also known as the ‘aura’, can reveal everything about the patient’s state of health. For reliable diagnosis, the individual-specific autologous blood nosode according to Korsakoff/Roesti (<b>single glass method</b>) has proven effective in practice.</p><p>Two striking cases from the author’s veterinary practice confirm the high effectiveness of the techniques described.</p>