Is it reality? then why should i believe it?

Whether fiction or reality, these epics have been handed over from generation to generation. It is up to u to believe it or not. Incidentally, are these instances the only things u could see in the Puranas? What about the various advices on how to conduct ur life or to believe in the superhuman force (God?) and devote urself to Him fully? Look at the positive things also in any thing u read and u will become a better person.