This book is meant for many and can serve as a great revelation for someone passing through difficult times. It has questions that seek to find answers for people that are always worried about humanity but are ready to make the right decision.What are the possibilities of man? Are they limited? In addition, if limited, then what? Limits of human capabilities are not all about training the brain. It is the brain - a unique tool of human cultivation - that helps everyone to transform his or her life. Support of this work is an effective method of training the attention function.