58 By reason of his celibacy the priest is a man alone: that is true, but his solitude is not meaningless emptiness because it is filled with God and the brimming riches of His kingdom. Moreover, he has prepared himself for this solitude—which should be an internal and external plenitude of charity—if he has chosen it with full understanding, and not through any proud desire to be different from the rest of men, or to withdraw himself from common responsibilities, or to alienate himself from his brothers, or to show contempt for the world. Though set apart from the world, the priest is not separated from the People of God, because he has been "appointed to act on behalf of men," (107) since he is "consecrated" completely to charity (108) and to the work for which the Lord has chosen him. (109)
Source: Sacerdotalis Caelibatus (Vatican.va)