10 Students who follow the venerable tradition of celibacy according to the holy and fixed laws of their own rite are to be educated to this state with great care. For renouncing thereby the companionship of marriage for the sake of the kingdom of heaven (cf. Matt. 19:12), they embrace the Lord with an undivided love altogether befitting the new covenant, bear witness to the resurrection of the world to come (cf. Luke 20:36), and obtain a most suitable aid for the continual exercise of that perfect charity whereby they can become all things to all men in their priestly ministry. Let them deeply realize how gratefully that state ought to be received, not, indeed, only as commanded by ecclesiastical law, but as a precious gift of God for which they should humbly pray. Through the inspiration and help of the grace of the Holy Spirit let them freely and generously hasten to respond to this gift. Students ought rightly to acknowledge the duties and dignity of Christian matrimony, which is a sign of the love between Christ and the Church. Let them recognize, however, the surpassing excellence of virginity consecrated to Christ, so that with a maturely deliberate and generous choice they may consecrate themselves to the Lord by a complete gift of body and soul. They are to be warned of the dangers that threaten their chastity especially in present-day society. Aided by suitable safeguards, both divine and human, let them learn to integrate their renunciation of marriage in such a way that they may suffer in their lives and work not only no harm from celibacy but rather acquire a deeper mastery of soul and body and a fuller maturity, and more perfectly receive the blessedness spoken of in the Gospel.
Source: Optatam Totius (Vatican.va)