Belittling the Caste-System
Guru Nanak Dev disparagingly condemned caste-prejudices. To do away with this social malady he set an example. He visited Bhai Lalo an 'out-caste', and both had their meals together, giving a shocking surprise to the village-folk. Moreover, Mardana, the life-long companion of Guru Sahib was minstrel, coming from 'low-caste'.