The prayer for the sanctification of priests O Jesus, Eternal Supreme Priest, keep your priests in the care of your Sacred Heart, where none may harm them. Keep unblemished their anointed hands, which daily touch your sacred body. Keep their lips clean, which are daily moistened with Your Most Precious Blood. Keep them pure in heart marked by great seal of Your priesthood. Make them grow in love and faithfulness to You, protect them against depravation or infection of this world. Along with the power of changing bread and wine also grant them the power to change hearts. Bless their toil to give abundant fruit. May the souls whom they serve be their consolation here on earth and also as an eternal crown in the next life. Amen.

St. Teresa

To Jesus, the Eternal High Priest

O Jesus, Eternal High Priest, Divine Victim, who in a unique burst of love for the people, Thy brethren, made that the Christian priesthood gushed forth from Your Divine Heart, do not stop to pour at Thy priests invigorating streams of Thy infinite love. Dwell in them, O Lord, transforms them into You, making them through your grace the tools of your Mercy. Act in them and through them and make them become like You completely through the faithful imitation of your virtues worthy of worship, let them perform by the power and spirit of Your name, works which You have done for the salvation of the world.

Divine Redeemer of souls, look down at how many are still immersed in the darkness of error. Count the stray sheep wandering over the chasm, look at the crowds of the poor, the hungry, the ignorant and the weak, moaning at the edge of the precipice. Come back to us, O Jesus, through Thy priests. Become alive in them today, act through them and go again through the world, teaching, forgiving, comforting, devoting Yourself and forging new sacred bonds of love connecting the heart of God with the heart of man. Amen.

From the prayer book of Ursuline Sisters SJK

Prayer for Priests

Lord Jesus, You have chosen Your priests from among us and sent them out to preach Your Word and act in Your name. For such a great gift for your Church accept our praise and thanksgiving. We ask You, fill them with the fire of Your love so their priesthood reveals Your presence in the Church. Because they are vessels of clay, we pray that Your power permeated their weaknesses. Do not let them in their afflictions be crushed. Grant that in doubt they will never give in to despair, they will not succumb to temptation, in persecutions will not feel abandoned. Inspire them in prayer so that they will live each day the mystery of your death and resurrection. In moments of weakness send them your Spirit. Help them to praise your heavenly Father and pray for poor sinners. By the power of the Holy Spirit put Your word on their lips and pour your love in to their hearts, so that they could carry the good news to the poor and healing to the depressed and desperate. May the gift of Mary, your Mother for disciple whom You loved, will be a gift to every priest. Grant that She, who formed You in her own human image, created them in Your divine likeness, by the power of Your Spirit, to the glory of God the Father. Amen.

Prayer of Pope Paul VI for priests

O Lord, give to Your servants the heart, which will embrace their whole education and preparation. Let it be aware of the big new way, which emerged in their lives and engraved in their souls. The heart that will be capable of new feelings that You recommend to those whom You have chosen to be the servants of Your Eucharistic Body and Thy Mystical Body of the Church.

O Lord, give them the pure heart, capable of loving only You fully and with such joy, and such a depth which only You can give, when You become in full exclusive the subject of the human heart. The pure heart which will not know evil, perhaps only to be able to recognize it, fight and avoid it, the pure heart of a child, capable of wonder, awe and fear. O Lord, give them the big heart open to Your thoughts and closed to any narrow ambitions, any petty rivalry between people. The huge heart, capable of being matched to Yours and able to embrace the whole Church, the spread of light, capable of loving all, serving all, and being the spokesman for all.

In addition, O Lord, give them the strong heart, willing and ready to face any difficulties, any temptations, any weaknesses, any boredom, any fatigue, the heart able to patiently and heroically serve the mystery which You entrusted to the sons of Yours, whom You identify with Thy.

In the end, O Lord, the heart capable of true love that is able to understand, accept, serve and sacrifice, capable of being happy, pulsating with Your feelings and Your thoughts. Amen.