During the 1960's in America, at the time of the Vietnam War, a new devotee asked Srila Prabhupada, "What is it like in Krsnaloka?" Srila Prabhupada replied, "You won't be bothered by the draft board." That was a suitable (and humorous) reply for a person plagued with that particular fear, but there is of course much more to Krsnaloka than "no draft board." Sometimes when Prabhupada was pressed with inquiries about the spiritual world, he would reply, "You will know when you go there."

SDG, in his Narada-bhakti-sutras commentary.