The dream is recognized as a dream because of its contrast to physical life, as everything is recognized by its contrast. We recognize woman because there is man; day is recognized because there is night, but to find the contrast to the dream of life is very hard. Let us see what makes a dream to be called a dream. There are three things: its changing character, its momentariness, and its deluding nature. Life in this world has the same attributes. If we consider ourselves - our body, the body of another - we see that at every moment we are changing. At one moment we find ourselves so angelic, so good, so mild, at another we find ourselves so rebellious that we would fight with Satan. As to the momentariness, the transitory nature - where are those who were so great as Dara (Darius) and Sikandar (Alexander the Great) whose glory promised to last always?