The Catholic priesthood is the heart of the Society of Saint Pius X. The training and supporting of holy priests is its primary mission. "The Society’s purpose is the priesthood and all that pertains to it and nothing but what concerns it; i.e., the priesthood as Our Lord Jesus Christ willed it when He said: Do this for a commemoration of me.” Statutes of the SSPX: - "The object of the Society"
The Society must therefore orient the priest towards—and have him concretize in his daily life what is essentially his raison d’etre—the Holy Sacrifice of the Mass, with all that it means, all that flows from it, and all that complements it.
The Apostle of the Gentiles thus perfectly sums up what may be said of the greatness, the dignity and the duty of the Christian priesthood: Sic nos existimet homo ut ministros Christi et dispensatores mysteriorum Dei—'"Let a man so account of us as of the ministers of Christ and the dispensers of the mysteries of God."
The priest is the minister of Christ, an instrument, that is to say, in the hands of the divine redeemer. He continues the work of the redemption in all its world-embracing universality and divine efficacy, that work that wrought so marvelous a transformation in the world.
"Thus the priest, as is said with good reason, is indeed 'another Christ'; for, in some way, he is himself a continuation of Christ. 'As the Father hath sent Me, I also send you,' is spoken to the priest, and hence the priest, like Christ, continues to give 'glory to God in the highest and on earth peace to men of good will.'" Pius XI, Ad Catholici Sacerdotii