Chhattisgarh Governor Balramji Das Tandon and Chief Minister Raman Singh condoled his death here.
Diwan passed away at Gurgaon-based Medanta Hospital this morning where he was being treated for brain hemorrhage.
"Saint Diwan had dedicated his life to serve people. He was a sensitive poet and a humanitarian personality. He walked the path of spirituality and guided others towards the light. His contribution to Chhattisgarh is unforgettable," Tandon said.
Singh said Diwan's "sudden death has created a vacuum in the spiritual and cultural fields" and he had contributed a lot to the creation of Chhattisgarh state.
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The Chhattisgarh Assembly also paid a tribute to Diwan.
Chief Minister Singh, Deputy Speaker Badrinath Diwan, Parliamentary Affairs Minister Ajay Chandrakar, Leader of Opposition T S Singhdeo, state Congress chief Bhupesh Baghel and others paid tributes to Diwan.
His body was brought here by a special chartered flight from New Delhi and the final rites will be performed tomorrow at Rajim town with full state honours, official sources said.