Prthu Dasa:

“One morning we were walking with Srila Prabhupada near the Eiffel Tower when Sivananda asked, ‘What about your internal life, Srila Prabhupada?’ Prabhupada, obviously annoyed, replied sharply, ‘That you do not require!’ Somehow or other, Sivananda didn’t get the message and dared to ask the same question again: ‘But Prabhupada, it would be interesting to know about your personal, intimate relationship with Lord Krsna.’ Srila Prabhupada stopped walking, turned to Sivananda, and angrily repeated, ‘That you do not require!’ Then he simply walked off. He was clearly displeased with our attempt to intrude into his inner life.”

From

Srila Prabhupada and his Disciples in Germany, by Vedavyasa Dasa