India, Nov. 30 -- Guru Nanak Dev ji, the founder of Sikhism, shattered the arrogant walls of caste, creed and religion with love, compassion and humility. In his eyes, all were equal. Sarbat da bhala (welfare of all) is one of the core principles of Sikhism that can lead us to a humane world. The saint's life-long companion was Bhai Mardana Ji, the first Sikh who was born in a Muslim family....