Intended for the skeptic demanding scientific proof for the workings of homeopathy, this book proposes to answer questions often asked by critics: Has homeopathy a therapeutic that goes beyond placebo? Is there an active principle in homeopathic remedies? What is the action in homeopathic remedies that promote healing? Gray answers are sometimes not entirely convincing, particularly when he ventures on scientific grounds. The book, nevertheless, does demonstrate the effectiveness of homeopathic treatment even if there is still no answer to the question: How?

To improve one’s practice, one needs to strictly adhere to the fundamental principles of homeopathy as taught by Hahnemann.