This book is about how to live long and painlessly, without exhausting yourself with fasting, enemas, etc. It is not recommended for people who are prone to self-torture under the pretext of improving their health. Some people believe that if they purchased a book about preserving health, you’ve already done quite a lot for your body. Some go much further: they read this book and only after that they begin to think the same thing. And someone even tries to do something practical for health, but chooses strange pretentious things for this. This book is not for such people. Rather, it is suitable for those who are cautious, moderately lazy, but also disciplined and rigidly determined to preserve themselves for their own joy and for great things.