In Hasidic discourse, the willingness of the leader to sacrifice the ecstasy and fulfillment of unity in God was deemed a heavy sacrifice undertaken for the benefit of the congregation. His followers were to sustain and especially to obey him, as he possessed superior knowledge and insight gained through communion. The "descent of the Righteous" ("Yeridat ha-Tzaddiq") into the matters of the world was depicted as identical with the need to save the sinners and redeem the sparks concealed in the most lowly places. Such a link between his functions as communal leader and spiritual guide legitimized the political power he wielded. It also prevented a retreat of Hasidic masters into hermitism and passivity, as many mystics before them did. Their worldly authority was perceived as part of their long-term mission to elevate the corporeal world back into divine infinity. To a certain extent, the Saint even fulfilled for his congregation, and for it alone, a limited Messianic capacity in his lifetime. After the Sabbatean debacle, this moderate approach provided a safe outlet for the eschatological urges. At least two leaders radicalized in this sphere and caused severe controversy: Nachman of Breslov, who declared himself the only true "Tzaddiq", and Menachem Mendel Schneerson, whom many of his followers believed to be the Messiah. The "Rebbe"s were subject to intense hagiography, even subtly compared with Biblical figures by employing prefiguration. It was argued that since followers could not "negate themselves" sufficiently to transcend matter, they should instead "negate themselves" in submission to the Saint ("hitbatlut la-Tzaddiq"), thus bonding with him and enabling themselves to access what he achieved in terms of spirituality. The Righteous served as a mystical bridge, drawing down effluence and elevating the prayers and petitions of his admirers.