Changing a pessimistic person and making him or her feel that the world is beautiful is a challenge that requires patience, understanding, and care. Here are some suggestions that might be useful: 1. encourage them to try new things. Give them the opportunity to try new things such as participating in new activities, traveling to new places, learning new skills, and so on. These new experiences allowed them to come into contact with new people and things, thus widening their horizons and ways of thinking. 2. share positive stories with them. Sharing positive stories. These can be personal success stories, other people's happiness stories, or good news reports. These stories could make them feel hope and possibility and change their attitude. 3. Help them build positive relationships. Get them in touch with optimistic people and connect with them. These positive interpersonal relationships could make them feel support and encouragement, thus increasing their self-confidence and beliefs. 4. Give positive feedback. Give them positive feedback and praise when they make positive actions or decisions. This kind of positive feedback could make them feel their value and importance, thus increasing their self-confidence and beliefs. Help them see hope for the future. Let them see the hope and possibilities of the future and encourage them to believe that they can overcome the challenges and achieve their goals. This kind of confidence in the future could make them more optimistic and positive. It was important to note that changing a person's personality and attitude required time and effort. During this process, patience, understanding, and respect for their feelings and choices were required.