This is a must read for anybody who wants to understand the philosophy of homeopathy in real sense. The concepts of vital force, homeopathic laws, why homeopathic remedies acts, the dynamic action of drugs, the dose, the remedy reaction, second prescription, susceptibility and many such concepts have been discussed in this book which remain unknown for many homeopaths. Roberts is known to be one of best homeopaths who have attempted and were successful in making these concepts clear for homeopaths or anybody who wants to know this subject. The lectures on miasms given in the book are also worth a hundred times read.