After his memorable work in the West, Swami Vivekananda landed at Colombo on the afternoon of January 15, 1897, and was given a right royal reception by the Hindu community there. In response, Swami Vivekananda delivered this public lecture on the 16th highlighting India's gift to the world, the light spiritual.
This lecture is available in the books 'Lectures from Colombo to Almora' and 'Complete Works of Swami Vivekananda', both published by Advaita Ashrama.