The inspiration for the collection. According to the theory of Carl Gustav Jung, there are two different categories of people: introverts or extraverts. Introverts tend to focus on their inner world, which usually proves to be a powerful source of creativity. Introverts are not easy to understand, sometimes they can even cause ambiguous feeling: attractive mysteriousness and mysticism is accompanied by an illusion of inaccessibility, sadness and melancholy. Introverts are sensitive and emotional characters who prioritize calmness and meaningful relationships.