This medical guide introduces methods that will help to heal currently incurable diseases, namely, cancers and collagen and allergic diseases. Although all of currently available cancer drugs are harmful due to their strong side effects, harmless and side effect-free cancer drugs; benzaldehyde derivatives, were discovered by a Japanese genius in 1980. Owing to the experts' intentional silence, the discovery is still unknown to most people. Three decades having passed, it seems to be about time for everybody to know about it. Details are given in the second chapter. A novel concept concerning antibodies' replacements was conceived by another Japanese genius, namely, the author in 1991. His trials to publicize the concept through popular medical journals met a stubborn resistance, presumably because the concept is too simple and clear-cut and yet extraordinarily useful, namely, literally all of collagen and allergic diseases heal completely by its application. Detailed explanations are given in the first chapter. The third chapter demonstrates a handy way to improve over-nourished states without restricting food intake. The fourth and fifth chapters give information concerning enlightenment, cosmic providence, cosmic views, etc.