In his first comments after his election, Kovind, 71, who will be only the second Dalit to occupy the highest constitutional position, asserted that protecting the Constitution and maintaining its dignity would be his duty.
He said he never thought or aspired to be the president but his "tireless service" to his society and country had brought him to this position.
"It is a very emotional moment for me personally. It is raining a lot in Delhi today and it reminds me of days when I would stay in my paternal village. It was a 'kachcha' home of mud walls. The straw roof would not be able to stop water during rains. We all brothers and sisters would huddle around a wall, waiting for the rains to stop," he said.
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His election to a position held by distinguished personalities like Rajendra Prasad, Sarvepalli Radhakrishnan, A P J Abdul Kalam and Pranab Mukherjee had given him a sense of huge responsibility, he said.
An emotional but poised Kovind said his election was a message to all those who were discharging their duties with honesty and integrity.
The former Bihar governor and two-term Rajya Sabha member thanked the people of India and elected representatives for showing their confidence in him.
He also sent his good wishes to Meira Kumar, his rival in the election and the opposition's candidate.