Incarnation of Goddess Lakshmi:
The third day, the day of the Lakshmi Puja, is the main festive day. On the auspicious new moon day, which is ‘Amavasyaa’ of the Hindi month of Kartik, the Goddess of wealth and prosperity – Lakshmi was incarnated. She appeared during the churning of the ocean, which is called ‘Samudra Manthan’, by the demons on one side and ‘Devataas’ (Gods) on the other side. Therefore, the worship of Goddess Lakshmi, the Lakshmi Pujan, on the day of Diwali, became a tradition.
People light lamps, candles, and lanterns, and offer prayers to Goddess Lakshmi, Lord Ganesha, GoddessSaraswati, and Kubera. Goddess Lakshmi, who symbolizes wealth and prosperity, is believed to roam the earth on Diwali night. The most auspicious time for the puja is decided when amavasyatithi prevails during pradoshkaal or the evening time. Mothers, who are seen as an embodiment of the goddess, are revered on this day. This is also an important day for socializing, and people visit their friends and relatives and exchange gifts. In the region of Bengal, Northeast Bihar, and Assam, this day is celebrated as Kali Puja and Goddess Kali is worshipped at night with Tantric rites and mantras. Offerings of red hibiscus flowers, animal blood in a skull, sweets, rice and lentils, fish and meat is made to Kali and ritualistic slaughter of animals is also made to appease her. In the Kalighat Temple in Kolkata and in Kamakhya Temple in Guwahati, Kali is worshipped as Lakshmi on this day.
Kali destroys evil:
Maa Kali is the fearful and ferocious type of the mother goddess Durga. She assumed the form of a powerful goddess and became popular with the composition of the Devi Mahatmya. She is depicted as having born from the forehead of Goddess Durga during one of her battles with the evil forces. As the legend goes, in the battle, Kali was a lot concerned within the killing spree that she got carried away and began destroying everything in sight. To cease her, Lord Shiva threw himself underneath her feet.
Shocked at this sight, Kali caught out her tongue in astonishment, and put an end to her homicidal rampage. On Diwali, Kali Puja is done to diminish the ego and all negative tendencies that hinder spiritual progress and material prosperity. The primary purpose of the puja is to seek the help of the goddess in destroying evil – both in the outside world and within us.
Vaman-avtaara rescued goddess Lakshmi:
Once, Indra killed demon king Bali and his chief generals in a combat between the demigods and the demons. When Indra started killing the demons with the vow of annihilating all the demon dynasty, Brahma sent Narada to stop him. Shukracharya, revived Bali by utilizing the artwork of mrita-samjivani. For the advantage of the demons, Sukracarya suggested Bali to rearrange for a vishvajit-yajna to be carried out by brahmanas of the Bhrigu dynasty. Bali became tremendously powerful by the power of mantra and besieged heaven with his military of demons.
Indra and the other demigods left heaven and started to stay clandestinely in space. The god of mothers Aditi observed Kesava-toshana vrata (a fast to please Kesava) for twelve days. On the finish of the fast, the Lord appeared before Mother Aditi and guaranteed her that He would appear as her son at the proper time under auspicious indications and would fulfil her desire. On the twelfth day of the month of Sravana, at the very auspicious moment of the Abhijit star, Lord Narayana appeared from the womb of Aditi.
Vishnu miraculously assumed the form of a dwarf (Vamana), although he was perfectly proportioned. It was on a Kartik day that Lord Vishnu disguised himself as a short Brahmin and approached Bali for some charity. A big-hearted king, Bali tried to help the Brahmin. However the entire thing was a trick by Lord Vishnu and finally the King had to surrender all his kingship and wealth. Diwali celebrates this defeating of Mahabali by Lord Vishnu.