We find these compositions marked by a third feature which, however, as we have already seen, is not peculiar to them,--the dialogue form. In order to bring about a reconciliation with an angered god, three personages were necessary in the drama,--the god, the penitent, and, thirdly, the priest, acting as mediator between the sinner and his deity. The deity, according to Babylonian notions, could not be approached directly, but only through his chosen messengers,--the priests. This idea of mediation, as against the immediate approach, was so pronounced as to lead, as we have seen, to the frequent association with a god of a second divine personage,--his son or his servant,--through whom the petitions of mankind were brought to the throne of grace.[468] The priest was similarly conceived as the messenger of the god, and, by virtue of this office, endowed with a certain measure, at least, of divine power. He was, in the full sense, the god's vicar on earth,--his representative, who could, as we saw in the Ishtar hymn, speak in the first person on behalf of the god.[469] The more manifest mission of the priest, however, was to intercede on behalf of the mass of mankind. Accepting the sacrifices offered by the laity, it was he that secured their gracious acceptance on the part of the deity. It was the priest, as we have seen, who instructed the individual to pronounce the magic formulas that would be appropriate to his case; and just as in the incantation texts the priest accompanied the recitation of the formulas with an appeal of his own, so in the penitential psalms, he stood at the penitent's side, instructing him what to say, and emphasizing the confessions of the penitent by an assurance to the deity of the sincerity of the penitent, coupled with a fervent request that the prayer for 'appeasement,' which involved all that we mean by forgiveness, be graciously answered.