There are many synonyms for the phrase "light the world" that convey a similar message of spreading positivity and making a difference in the lives of others. Some options include "illuminate the world," "brighten the world," "shine a light on the world," "be a beacon of hope," "radiate kindness," and "spark joy." These phrases evoke a sense of inspiration and encouragement to take action and make a positive impact on the world around us. Whether it's through acts of kindness, sharing knowledge and resources, or simply spreading joy and positivity, we can all play a role in lighting up the world for those around us.