Looking forward to his visit to India, US President Barack Obama has greeted the Indian people on Diwali. In a message to Indian people celebrating the festival of lights the US President said this is a day when members of some of the world oldest religions in India and America celebrate the triumph of good over evil. President Obama said Diwali is not only a time for celebration but also a time for reflection when we must remember that there are always others less fortunate than ourselves.He said the occasion also reminds that we should commit ourselves to help those in need.