The sages made use of these things to illustrate the eternal principles of religion. The Puranas were meant, not for the scholars, but for the ordinary people who could not understand high philosophy and who could not study the Vedas. The Darsanas or schools of philosophy are very stiff. They are meant only for the learned few. The Puranas are meant for the masses with inferior intellect.
Religion is taught in a very easy and interesting way through the Puranas.
Even to this day, the Puranas are popular. The Puranas contain the history of remote times. They also give a description of the regions of the universe not visible to the ordinary physical eye. They are very interesting to read and are full of information of all kinds. Children hear the stories from their grandmothers.