as empowered incarnation (shaktiavesa)

When King Prthu is described as an incarnation of Lord Visnu, it should be understood that he is a saktyavesa-avatara, part and parcel of Lord Visnu, and is specifically empowered by Him. Any living being acting as the incarnation of Lord Visnu is thus empowered by Lord Visnu to preach the bhakti cult. Such a person can act like Lord Visnu and defeat demons by arguments and preach the bhakti cult exactly according to the principles of sastra. As indicated in Bhagavad-gita, whenever we find someone extraordinary preaching the bhakti cult, we should know that he is especially empowered by Lord Visnu or Lord Krsna. As confirmed in Caitanya-caritamrta, krsna-sakti vina nahe tara pravartana: one cannot explain the glories of the holy name of the Lord without being specifically empowered by Him. If one criticizes or finds fault with such an empowered personality, one is to be considered an offender against Lord Visnu and is punishable. Even though such offenders may dress as Vaisnavas with false tilaka and mala, they are never forgiven by the Lord if they offend a pure Vaisnava. There are many instances of this in the sastras.    (More...)