The purpose of this book was to increase the power of the individual, especially in optimism, and to control positive emotions based on the principles of positive psychology of a teenager and minimize negative thoughts to develop positive feelings to develop optimism about life. The book can be read by the youth himself, who needs guidance in developing optimism in himself. These books are designed for psychologists, therapists, guidance and counseling teachers, and psych undergraduates as guidelines or ordinances on developing optimism in any child or youth.