India, Nov. 7 -- Every year, millions of lamps are lit across India in a shared affirmation that darkness, however deep, need not prevail. This is the enduring promise of Diwali, a celebration of light, hope, renewal and the triumph of good over evil. It is a time when homes are illuminated, prayers are offered, relationships are strengthened and new beginnings are welcomed. Yet beneath these familiar expressions of celebration lies an extraordinary diversity of beliefs and customs. Diwali is not simply one story observed in one way, but a festival through which generations and communities have expressed their understanding of faith, prosperity, remembrance and righteousness.

Also known as Deepavali, from the Sanskrit expression meaning ...