Illusion is the false appearance or impression of reality. The best example for an illusion can be the mirror, for the mirror gives the illusion of depth. The image in the mirror appears to be the exact of the original object. But it is not original and it is just an appearance. In our life too, we have many such illusions like that of mirror and image. Rich seems to have a happier living with money, and poor seems to have the happier living with good hearted human beings. It is the perspective, in which one sets his views.