The word prajvarah is very significant, for it means the fever sent by Lord Visnu. Such a fever is always set at 107 degrees, the temperature at which a man dies. Thus the King of the mlecchas and yavanas requested the daughter of Time, Kalakanya, to become his sister. There was no need to ask her to become his wife, for the yavanas and mlecchas do not make distinctions as far as sex life is concerned. Thus one may outwardly be a sister, mother or daughter and still have sex. Yavana-rajas brother was Prajvara, and Kalakanya was invalidity itself. Combined and strengthened by the soldiers of Yavana-rajanamely nonhygienic conditions, illicit sex and ultimately a high degree of temperature to bring on deaththey would be able to smash the materialistic way of life. In this connection it is significant that Narada was immune to the attack of jara, or invalidity, and similarly jara, or the destructive force, cannot attack any follower of Narada Muni or a pure Vaisnava.