The letter, which spells out the bond between the two leaders who come from different political ideologies, was shared by the former president on Twitter today.
Modi said he had come to New Delhi, three years ago, as an outsider.
"The task before me was huge and challenging. In these times, you have always been a father figure and a mentor to me. Your wisdom, guidance and personal warmth have given me greater confidence and strength," the prime minister said.
The prime minister said Mukherjee's "intellectual prowess" had been of constant help.
On my last day in office as the President, I received a letter from PM @narendramodi that touched my heart! Sharing with you all. pic.twitter.com/cAuFnWkbYn
— Pranab Mukherjee (@CitiznMukherjee) August 3, 2017














