It is known that the First Ecumenical Council which took place at Nicaea included in its legislation a discipline of the priesthood known as clerical 'continence' or celibacy. This was the requirement of all priests and bishops to refrain from sexual contact with their wives or with any other woman. Thus, for a married man to become a priest, his wife had to agree to abstain from all sexual relations. This discipline added to the legislation of various councils, particularly the Council of Elvira, the date of which cannot be determined with precision, but believed to have been in the first quarter of the fourth century, in Spain. While priests of the East and West were required to refrain from all sexual contact by virtue of their presiding at sacrifices, this was an exceedingly difficult discipline to maintain. Just as the Levite priests of the Jewish Temple in Jerusalem had been required to abstain from sexual contact merely for a lengthy period prior to the periodic performance of the sacrifices of the temple, so the priests of the Early Church were required by ecclesiastical law to abstain from sexual contact. However, Christian priests presided at the sacrifice of the Eucharist every Sunday as well as the annual feasts of the various martyrs. Thus, the Christian calendar did not afford Christian priests periods in which they could be sexually active with their wives.
The ''Directa'' Decretal
In the Directa, the Pope dealt with the fact that clerics were still living with their wives and having children, thus contravening the Council of Elvira and the First Ecumenical Council. Priests were justifying this by referring to the traditions of the Levitical priesthood of the Old Testament. Siricius was emphatic that clerical continence belonged to immemorial, even apostolic, tradition. He declared that priests had been under a duty to observe temporary continence when serving in the Temple, but that the coming of Christ had brought the old priesthood to completion, and by this fact the duty of temporary continence had become an obligation to perpetual continence. Fifteen points are studied in the decretal, but the key passage is: Continence was required of all Christian priests by ecclesiastical law until the great schism, and is still required of Catholic prieststoday; many Eastern Catholic Churches do not require celibacy of their priests.
