Do not stop anyone from working a miracle in my name
John said to Jesus, ‘Master, we saw a man who is not one of us casting out devils in your name; and because he was not one of us we tried to stop him.’ But Jesus said, ‘You must not stop him: no one who works a miracle in my name is likely to speak evil of me. Anyone who is not against us is for us.
‘If anyone gives you a cup of water to drink just because you belong to Christ, then I tell you solemnly, he will most certainly not lose his reward.
‘But anyone who is an obstacle to bring down one of these little ones who have faith, would be better thrown into the sea with a great millstone round his neck. And if your hand should cause you to sin, cut it off; it is better for you to enter into life crippled, than to have two hands and go to hell, into the fire that cannot be put out. And if your foot should cause you to sin, cut it off; it is better for you to enter into life lame, than to have two feet and be thrown into hell. And if your eye should cause you to sin, tear it out; it is better for you to enter into the kingdom of God with one eye, than to have two eyes and be thrown into hell where their worm does not die nor their fire go out.’
Source: Jerusalem Bible
Catechism of the Catholic Church
The priesthood of the Old Covenant
1539 The chosen people was constituted by God as “a kingdom of priests and a holy nation.” But within the people of Israel, God chose one of the twelve tribes, that of Levi, and set it apart for liturgical service; God himself is its inheritance A special rite consecrated the beginnings of the priesthood of the Old Covenant. The priests are “appointed to act on behalf of men in relation to God, to offer gifts and sacrifices for sins.”
1540 Instituted to proclaim the Word of God and to restore communion with God by sacrifices and prayer, this priesthood nevertheless remains powerless to bring about salvation, needing to repeat its sacrifices ceaselessly and being unable to achieve a definitive sanctification, which only the sacrifice of Christ would accomplish.
1541 The liturgy of the Church, however, sees in the priesthood of Aaron and the service of the Levites, as in the institution of the seventy elders, a prefiguring of the ordained ministry of the New Covenant. Thus in the Latin Rite the Church prays in the consecratory preface of the ordination of bishops:
God the Father of our Lord Jesus Christ, . . .
by your gracious word
you have established the plan of your Church.
From the beginning,
you chose the descendants of Abraham to be your holy nation.
You established rulers and priests
and did not leave your sanctuary without ministers to serve you. . . .
1542 At the ordination of priests, the Church prays:
Lord, holy Father, . . .
when you had appointed high priests to rule your people,
you chose other men next to them in rank and dignity
to be with them and to help them in their task. . . .
you extended the spirit of Moses to seventy wise men. . . .
You shared among the sons of Aaron
the fullness of their father’s power.
1543 In the consecratory prayer for ordination of deacons, the Church confesses:
Almighty God . . .,
You make the Church, Christ’s body,
grow to its full stature as a new and greater temple.
You enrich it with every kind of grace
and perfect it with a diversity of members
to serve the whole body in a wonderful pattern of unity.
You established a threefold ministry of worship and service,
for the glory of your name.
As ministers of your tabernacle you chose the sons of Levi
and gave them your blessing as their everlasting inheritance.
1041 The message of the Last Judgment calls men to conversion while God is still giving them “the acceptable time, . . . the day of salvation.” It inspires a holy fear of God and commits them to the justice of the Kingdom of God. It proclaims the “blessed hope” of the Lord’s return, when he will come “to be glorified in his saints, and to be marveled at in all who have believed.”
For the leader. Of David, the servant of the LORD, who sang to the LORD the words of this song after the LORD had rescued him from the clutches of all his enemies and from the hand of Saul.
He said: I love you, LORD, my strength,
LORD, my rock, my fortress, my deliverer, My God, my rock of refuge, my shield, my saving horn, my stronghold!
Praised be the LORD, I exclaim! I have been delivered from my enemies.
The breakers of death surged round about me; the menacing floods terrified me.
The cords of Sheol tightened; the snares of death lay in wait for me.
In my distress I called out: LORD! I cried out to my God. From his temple he heard my voice; my cry to him reached his ears.
The earth rocked and shook; the foundations of the mountains trembled; they shook as his wrath flared up.
Smoke rose in his nostrils, a devouring fire poured from his mouth; it kindled coals into flame.
He parted the heavens and came down, a dark cloud under his feet.
Mounted on a cherub he flew, borne along on the wings of the wind.
He made darkness the cover about him; his canopy, heavy thunderheads.
Before him scudded his clouds, hail and lightning too.
The LORD thundered from heaven; the Most High made his voice resound.
He let fly his arrows and scattered them; shot his lightning bolts and dispersed them.
Then the bed of the sea appeared; the world’s foundations lay bare, At the roar of the LORD, at the storming breath of his nostrils.
He reached down from on high and seized me; drew me out of the deep waters.
He rescued me from my mighty enemy, from foes too powerful for me.
They attacked me on a day of distress, but the LORD came to my support.
He set me free in the open; he rescued me because he loves me.
The LORD acknowledged my righteousness, rewarded my clean hands.
For I kept the ways of the LORD; I was not disloyal to my God.
His laws were all before me, his decrees I did not cast aside.
I was honest toward him; I was on guard against sin.
So the LORD rewarded my righteousness, the cleanness of my hands in his sight.
Toward the faithful you are faithful; to the honest you are honest;
Toward the sincere, sincere; but to the perverse you are devious.
Humble people you save; haughty eyes you bring low.
You, LORD, give light to my lamp; my God brightens the darkness about me.
With you I can rush an armed band, with my God to help I can leap a wall.
God’s way is unerring; the LORD’S promise is tried and true; he is a shield for all who trust in him.
Truly, who is God except the LORD? Who but our God is the rock?
This God who girded me with might, kept my way unerring,
Who made my feet swift as a deer’s, set me safe on the heights,
Who trained my hands for war, my arms to bend even a bow of bronze.
You have given me your protecting shield; your right hand has upheld me; you stooped to make me great.
You gave me room to stride; my feet never stumbled.
I pursued my enemies and overtook them; I did not turn back till I destroyed them.
I struck them down; they could not rise; they fell dead at my feet.
You girded me with strength for war, subdued adversaries at my feet.
My foes you put to flight before me; those who hated me I destroyed.
They cried for help, but no one saved them; cried to the LORD but got no answer.
I ground them fine as dust in the wind; like mud in the streets I trampled them down.
You rescued me from the strife of peoples; you made me head over nations. A people I had not known became my slaves;
as soon as they heard of me they obeyed. Foreigners cringed before me;
their courage failed; they came trembling from their fortresses.
The LORD lives! Blessed be my rock! Exalted be God, my savior!
O God who granted me vindication, made peoples subject to me,
and preserved me from my enemies, Truly you have exalted me above my adversaries, from the violent you have rescued me.
Thus I will proclaim you, LORD, among the nations; I will sing the praises of your name.
You have given great victories to your king, and shown kindness to your anointed, to David and his posterity forever.
Source: The New American Bible