This book is called Erwin Schrödinger's philosophical testament. It outlines the worldview of a natural scientist who had a significant impact on the development of modern physics.Anything is possible exactly until a choice is made.Imagine that you have a box with a radioactive core and a container with poisonous gas. There is a 50% chance that the core will disintegrate and activate the mechanism that opens the container. If you put a cat in this box and close it, Schrödinger's paradox will arise. According to quantum mechanics, if no observation is made over the nucleus, then its state is described by a mixture of two states - a decayed and non-decayed nucleus, therefore, a cat sitting in a box is both alive and dead at the same time.For those who wants to know more, for those who dare to find out what exactly is the paradox of Schrödinger's theory, for those who want to know what life is from the point of view of physics, the great scientist wrote his last and best work.