Roger Chillingworth does not wish to explain why he has abandoned his wife to live with Indians where he has studied herbs and medicinal cures. His past history would be subject to questioning and, according to the Puritans, would be considered witchcraft.
This is the authors point of view
According to Hindu mythology, the Prince of Ayodhya, Lord Rama, returned home with his wife Mata Sita and brother Lakshmana on the auspicious occasion of Diwali. They came back to Ayodhya after spending 14 years in exile and defeating the King of Lanka, Ravana. People of Ayodhya had celebrated their return with great enthusiasm by lighting rows of lamps and diyas. The tradition has continued till date and is celebrated as the festival of Diwali.
