The great sage Narada Muni has a spiritual body; therefore old age, disease, birth and death do not affect him. Narada is the most kind devotee of the Supreme Lord, and his only business is to travel all over the universe and preach God consciousness. In other words, his business is to make everyone a Vaisnava. Under the circumstances, there is ordinarily no need for him to stay in one place for more than the time he requires to preach. Since by his own free will he is already traveling all over the universe, the curse of Kalakanya is described as fortunate. Like Narada Muni, many other devotees of the Lord are engaged in preaching the glories of the Lord in different places and in different universes. Such personalities are beyond the jurisdiction of material laws.