H O L Y O R D E R S
Holy Orders is the sacrament by which a man is made a bishop, a priest, or a deacon, and thus dedicated to be an image of Christ. A bishop is the minister of this sacrament. 
https://www.sbdiocese.org/vocations/index.html
From the moment of Jesus' conception in the womb of Mary until his Resurrection, he was filled with the Holy Spirit. In biblical language, he was anointed by the Holy Spirit and thus established by God the Father as our high priest. As Risen Lord, he remains our high priest. . . . While all the baptized share in Christ's priesthood, the ministerial priesthood shares this through the Sacrament of Holy Orders in a special way. "Here I am, send me." (Is 6:8)
Ordination to the priesthood is always a call and a gift from God. Christ reminded his Apostles that they needed to ask the Lord of the harvest to send laborers into the harvest. Those who seek priesthood respond generously to God's call using the words of the prophet, "Here I am, send me" (Is 6:8). This call from God can be recognized and understood from the daily signs that disclose his will to those in charge of discerning the vocation of the candidate. ~from the United States Catholic Catechism for Adults
Prayer for Priests
Gracious and loving God, we thank your for the gift of our priests. Through them, we experience your presence in the sacraments.
Help our priests to be strong in their vocation. Set their souls on fire with love for your people.
Grant them the wisdom, understanding, and strength they need to follow in the footsteps of Jesus.
Inspire them with the vision of your Kingdom. Give them the words they need to spread the Gospel.
Allow them to experience joy in their ministry. Help them to become instruments of your divine grace.
We ask this through Jesus Christ, who lives and reigns as our Eternal Priest. Amen.
Prayer for Vocations
O God, Father of all Mercies, Provider of a bountiful Harvest, send Your Graces upon those
You have called to gather the fruits of Your labor; preserve and strengthen them in their lifelong service of you.
Open the hearts of Your children that they may discern Your Holy Will; inspire in them a love and desire to surrender themselves
to serving others in the name of Your son, Jesus Christ. Teach all Your faithful to follow their respective paths in life
guided by Your Divine Word and Truth. Through the intercession of the Most Blessed Virgin Mary,
all the Angels, and Saints, humbly hear our prayers and grant Your Church's needs, through Christ, our Lord. Amen.