Holy Orders is the sacrament through which the mission entrusted by Christ to his apostles continues to be exercised in the Church until the end of time: thus it is the sacrament of apostolic ministry. It includes three degrees: episcopate, presbyterate, and diaconate. (Catechism of the Catholic Church, #1536)

"Those who are chosen by God for the consecrated life make this spiritual longing their own in a definitive way. In it, in fact, they have one expectation: the Kingdom of God: that God reign in our will, in our hearts, in the world. In them burns a unique thirst for love which can be quenched by the Eternal One alone." -Pope Benedict XVI