Confirmation is a Sacrament in the Catholic Church in which the one who is confirmed (confirmandi) receives the gifts of the Holy Spirit through the imposition of hand and anointing with oils by the bishop. It’s considered a sacrament of initiation which means that it brings you deeper into communion with the Church.
Bishops are the original ministers of Confirmation along with other Catholic sacraments (Lumen Gentium 26).
“Bishops are the successors of the apostles. They have received the fullness of the sacrament of Holy Orders. The administration of this sacrament by them demonstrates clearly that its effects is to unite those who receive it more closely to the Church, her apostolic origins, and her mission of bearing witness to Christ.” (Catechism of the Catholic Church, paragraph 1313)
In the Eastern churches (non-Latin rites) the priest is the ordinary minister of this sacrament and performs it immediately after baptism. However, it is performed with chrism oil that has been consecrated by the bishop expressing the apostolic unity. In the Latin rite (which is the largest of all rites) the bishop is the ordinary minister. Read about the history of Confirmation.
In the west, most churches have the Bishop come and visit the local parish to confirm an entire class (age group) of students who spent the year preparing for confirmation. However, the Bishop can also ‘delegate’ his apostolic authority to perform the sacrament of confirmation to the local priest who is then able to administer the sacrament without the bishop having to be present.
Catholic Confirmation is performed with the ordinary minister extending his hand over the one to be confirmed and anointing his/her head with the oil of chrism saying, “be sealed with the Holy Spirit.” The actual Confirmation ceremony is much longer than this, but this is the “meat” of the action. The oil of chrism is consecrated by the bishop at the Chrism Mass on Holy Thursday and is reserved for special things like Baptism, Confirmation, Holy Orders, blessing of tower bells, consecration of churches, altars, chalices and patens.
In short, it is the full outpouring of the Holy Spirit as once granted to the apostles on the day of Pentecost. Confirmation brings Catholics a deepening of baptismal grace and unites us more firmly to Christ. It increases the gifts of the Holy Spirit and leaves an indelible mark on the soul just like baptism.
The seven gifts of the Holy Spirit received through Confirmation are
Anointing with oil is an ancient Biblical tradition originating in the old testament with the Jewish people. The Jews had a messiah and it was usually their king at the time, however they were also awaiting a greater messiah, one that would deliver them and raise them up. This messiah happened to be Jesus. The sign of the Messiah was that he was royal and messiahs were put in their position by being anointed with oil and an appointment from God. This tradition carried on in Christianity with the teaching of the sharing in Christ’s messiahship and his royal priesthood. In fact, the first example of Catholic Confirmation can be found in Acts 8:14-17.