The phrase 'the servant of humanity' has a biblical allusion. It refers to Jesus Christ. In a broader sense the phrase refers to anybody who works selflessly and relentlessly for the distressed humanity.
He spent most of his childhood near the scenic banks of the Brahmaputra river. It inspired him from his early life and later appeared in many of his paintings. Actually it was a great source of inspiration throughout his carcer.
He first came under spotlight after getting the Governor's Gold Medal in All India Exhibition in 1938.. It gave him confidence to create his own visual style.
He got admitted to the Government School of Art in Calcutta which is now known as Government College of Art and Craft, Kolkata, India. There he learned European academic style for five years.