As a general rule, education is extensive and lasts at least five or six years, depending on the national Programme of Priestly Formation. Regardless of where a person prepares for ordination, it includes not only academic but also human, social, spiritual and pastoral formation. The purpose of seminary education is ultimately to prepare men to be pastors of souls. In the end, however, each individual Ordinary (such as a bishop or Superior General) is responsible for the official call to priesthood, and only a bishop may ordain. Any ordinations done before the normally scheduled time (before study completion) must have the explicit approval of the bishop. The Rite of Ordination is what "makes" one a priest, having already been a deacon and with the minister of Holy Orders being a validly ordained bishop. The Rite of Ordination occurs within the context of Holy Mass. After being called forward and presented to the assembly, the candidates are interrogated. Each promises to diligently perform the duties of the Priesthood and to respect and obey his ordinary (bishop or religious superior). Then the candidates lie prostrate before the altar, while the assembled faithful kneel and pray for the help of all the saints in the singing of the Litany of the Saints. The essential part of the rite is when the bishop silently lays his hands upon each candidate (followed by all priests present), before offering the consecratory prayer, addressed to God the Father, invoking the power of the Holy Spirit upon those being ordained. After the consecratory prayer, the newly ordained is vested with the stole and chasuble of those belonging to the Ministerial Priesthood and then the bishop anoints his hands with chrism before presenting him with the chalice and paten which he will use when presiding at the Eucharist. The earliest Christians were Jews and Jewish tradition has always deemed the married state as more spiritual than the celibate state. However some Christian traditions place a higher spiritual value on chastity. According to the Catholic Bible, the Apostle Peter had a spouse from Gospel stories of Peter's mother-in-law sick with fever (Matt 8:14, Mark 1:29, Luke 4:38) and from Paul's mention that Peter took along a believing wife in his ministry (1 Cor 9:5). From its beginnings, the idea of clerical celibacy has been contested in canon courts, in theology, and in religious practices. Celibacy for Roman Catholic priests was not mandated under canon law for the universal church until the Second Lateran Council in 1139.