Benedict XVI distinguishes munus and potestas as useful concepts in understanding the authority of the diocesan bishop. While the concept of potestas finds its roots in the Roman law of jurisdiction, the terminology of munus is relatively new, as it derives from the theology of Dietrich von Hildebrand, who distinguished between munus sanctificandi, munus docendi and munus regendi. The bishop, as Pope Benedict XVI pointed out through episcopal consecration, shares in the munus, but this does not yet equal potestas, hence only the diocesan bishop who is not only in communio but in communio hierarchica with the Catholic Church enjoys legislative authority, which he exercises directly, but in the case of the exercise of the sacred power of the sacraments he can do so through the sacred ministers, and in the case of the executive power also through the lay faithful, on the basis of the missio canonica. This finds its concrete translation in the administration of intentions and Mass offerings in the diocese.