A special vocational calling from God is the duty to care and administer to God’s people through the sacrament of Holy Orders. The man who is ordained to such a task receives a gift of the Holy Spirit that gives him a sacred authority that is conferred upon him by Christ through the bishop (cf. YOUCAT 249).
The sacrament of holy orders has three degrees: Bishop(episcopate), Priest(presbyterate), Deacon(diaconate). A Bishop leads through service at a diocesan level, in a 2000-year unbroken line of succession, to the apostles. A Priest represents the local bishop at a parish level, helping guide members of the Church through the faith, the Sacred Word and the sacraments. A Deacon is a special ordination to service, usually answered by a married man.
A man who feels that they may be called to ministry in the Sacrament of Holy Orders should first contact their Parish Priest. A path of careful discernment must be followed, and formation takes a good number of years before the calling is confirmed through ordination.