This quote means that the person was born with a natural ability to make people laugh, as well as the insight that the world is often chaotic and unpredictable. The ability to make people laugh is seen as a ‘gift,’ or a special attribute that this person has. It is special because it is not something that everyone has or can do easily. The sense that the world is ‘mad’ implies that this person has an understanding that things do not always make sense and that there are a lot of strange, confusing, and unpredictable elements to life.