The Origin of Diwali
Vishnu(one of the Hindu Trinity) had a son by the name of Narakasura. Despite being the son of a deity, Narakasura's nature was evil. He brought all the kingdoms on earth under his control. Next, he turned his eyes towards heaven. Even the mighty Indra, the head of all devas(dewa in Malay language, meaning god) could not withstand the assault of this son of Vishnu and had to flee the heavens.
|Vishnu. Image: freethoughtpedia.com|
|Indra on a divine elephant. Image: westminster.edu|
|Krishna. Image: arunachalnews.com|
Now back to the story.
Narakasura had gained a boon from Brahma that he would die only in the hands of his mother. Hence it is almost impossible to kill Narakasura. Note that Brahma is one of the Hindu Trinity made up by Brahma, Vishnu and Shiva. Satyabhama, Krishna's consort, transformed herself into the avatar of Bhudevi, Narakasura's mother and went to war with her husband.
|Krishna battering Narakasura. Image: indianetzone.com|
There are several versions of the story however, but I have no time to relate them all here. There is a video on Youtube.com that tells the story of Krishna and Narakasura. You can watch the video here.