-- Ps 16:1-2a and 5, 7-8, 9-10, 11
Deacons share in Christ's mission and grace in a special way. The sacrament of Holy Orders marks them with an imprint ("character") which cannot be removed and which configures them to Christ, who made himself the "deacon" or servant of all. Among other tasks, it is the task of deacons to assist the bishop and priests in the celebration of the divine mysteries, above all the Eucharist, in the distribution of Holy Communion, in assisting at and blessing marriages, in the proclamation of the Gospel and preaching, in presiding over funerals, and in dedicating themselves to the various ministries of charity.
-- CCC 1570