57 All the People of God must give testimony to the mystery of Christ and His kingdom, but this witnessing does not take the same form for all. The Church leaves to her married children the function of giving the necessary testimony of a genuinely and fully Christian married and family life. She entrusts to her priests the testimony of a life wholly dedicated to pondering and seeking the new and delightful realities of God's kingdom. If this means that the priest is without a direct personal experience of married life, he nevertheless will be able through his training, his ministry and the grace of his office, to gain even deeper insights into every human yearning. This will allow him to meet problems of this kind at their source and give solid support by his advice and assistance to married persons and Christian families.(106) For the Christian family, the example of the priest who is living his life of celibacy to the full will underscore the spiritual dimension of every love worthy of the name, and his personal sacrifice will merit for the faithful united in the holy bond of matrimony the grace of a true union.
Source: Sacerdotalis Caelibatus (Vatican.va)