The book takes you through a father-daughter conversation into a powerful story of a little boy, Peter, who feels lonely because he has no friends. But he has a plan - he is building a spaceship that he wants to fly to a new world where he would find friendship and happiness. For now, only the sun can change his feeling of being alone, which seems to be his only true friend. One evening Petr talks to his dad about the meaning and significance of the word "I believe". He learns what it means to "believe in yourself". Thanks to this, Petr learns to believe in his own dreams. Although he is not sure at first, he does not stop believing and his dreams gradually become reality, and through his faith he finds a new world and the much-desired friendship... The book is intended for children from 8 years old, but also for everyone who solves their self-confidence, questions regarding self-evaluation and inclusion in society. The book will answer children's questions: - what does "trusting yourself" mean and how is it done, - where and how can you find friendship, - how to solve seemingly unsolvable problems. This book offers parents and everyone who is interested a deep insight into the emotional world of children, their experiences and way of thinking?