16 This is the way the Fathers of the Church have always interpreted the words of Jesus Christ and the teaching of the Apostle of the Gentiles; for from the very earliest days of the Church they have considered virginity a consecration of body and soul offered to God. Thus, St. Cyprian demands of virgins that "once they have dedicated themselves to Christ by renouncing the pleasures of the flesh, they have vowed themselves body and soul to God . . . and should seek to adorn themselves only for their Lord and please only Him." And the Bishop of Hippo, going further, says, "Virginity is not honored because it is bodily integrity, but because it is something dedicated to God. . . Nor do we extol virgins because they are virgins, but because they are virgins dedicated to God in loving continence." And the masters of Sacred Theology, St. Thomas Aquinas and St. Bonaventure, supported by the authority of Augustine, teach that virginity does not possess the stability of virtue unless there is a vow to keep it forever intact. And certainly those who obligate themselves by perpetual vow to keep their virginity put into practice in the most perfect way possible what Christ said about perpetual abstinence from marriage; nor can it justly be affirmed that the intention of those who wish to leave open a way of escape from this state of life is better and more perfect.
Source: Sacra Virginitas (Vatican.va)