"It has given me personal happiness," Kumar told reporters at Patna airport on return from New Delhi.
Kumar hailed President Pranab Mukherjee's kind gesture to travel to Vajpayee's residence to decorate him with Bharat Ratna.
"He has set a good example," Kumar said hailing President's gesture.
Kumar had served as cabinet minister in the NDA government of Atal Bihari Vajpayee.
Though he drove his JD(U) to sever ties with BJP over elevation of Narendra Modi on June 16, 2013 but he has alwyas hailed statesmanship of Vajpayee.