This sacrament allow men to become priests. This sacrament was given to us by Jesus at the Last Supper. The first men who received the power of priesthood were the apostles. A man that wants to be a priest has to go to school for many years.  After that is done, he has a ceremony where he is ordained and he becomes a priest.Priests are called in a special way to help us and to preach the Word of God.