Ordination is nothing other than a sacrament that gives the power and grace needed to perform sacred work, while marking the soul as a priest of Jesus Christ. The priest's sacred work is to celebrate Mass, give the sacraments and preach the Gospel. The order is multi-layered: Bishop, Priest, Deacon... On Holy Thursday, Jesus Christ celebrated the sacrament of Holy Orders. Only the bishop organizes the rank. Priests are needed to celebrate mass and distribute the sacraments...