Starting work on this book, first of all, I would like to share with readers my personal reflections on the emergence of my natural physical strength as a derivative of the strength of my spirit, present it as a product created by my many years of confrontation with the not always comfortable and favorable life circumstances and tell you about the only and unique author’s method of natural strength training in the world, called: “Petr Filaretov’s School of Strength.” This book is addressed, first of all, to those for whom the word “strength” is associated not only with the concept of some abstract physical magnitude, but also with a certain philosophical category, with an objective reality given to us in sensations, which has a huge impact on our entire life and accompanies us from birth to death.