Catholic Commentary on Matthew 5

"Blessed are the pure in heart, for they will see God." (Matthew 5:8)

The New Moses on the Mountain

Jesus goes up a mountain, sits down, and teaches. The posture is deliberate: the seated teacher is the authoritative teacher. The setting is deliberate: Moses received the Law on a mountain, and now the one who is greater than Moses gives a new and deeper law from another mountain. Matthew structures the Sermon on the Mount as the new Torah, the definitive teaching of the new covenant. Where Moses said "thus says the Lord," Jesus says "but I say to you," driving the Law deeper, from the external act to the internal intention. The Beatitudes that open the sermon are not conditions for entry into the Kingdom. They are descriptions of the Kingdom's citizens: eight dimensions of the one Christian soul, from poverty of spirit before God to suffering persecution for righteousness.

The Interior Life of the Law

Jesus takes six commandments and deepens each one into its interior dimension. Do not murder becomes do not be angry. Do not commit adultery becomes do not look with lust. The Sermon on the Mount is not a new and harsher legalism. It is the revelation of what the Law always intended: not the regulation of external behaviour but the transformation of the heart. The Catechism calls this the interiorisation of the Law, the writing of God's commands on the heart rather than on stone (CCC 1968). The most radical extension is the last: Love your enemies and pray for those who persecute you, so that you may be children of your Father in heaven. The standard is not the community's standard but the Father's character. He causes his sun to rise on the evil and the good. To be a child of the Father is to love with that breadth.

Salt and Light

Before the antitheses, Jesus gives two brief metaphors for the Christian's identity: You are the salt of the earth. You are the light of the world. Not "try to be" and not "you should become." You are, present tense. The Christian identity is prior to the Christian task. Salt that loses its saltiness is useless. A lamp under a bowl illuminates nothing. St. John Chrysostom wrote that these words are an honour and a challenge combined: to be told you are the light of the world is to be told that others are in darkness and that your life is their only light. That is a weight worth carrying carefully.

Living the Word

Brothers and sisters, the Beatitude "blessed are the pure in heart, for they will see God" is the summit of the eight. Purity of heart, as the Catechism teaches, is the single-minded ordering of the whole person toward God: one master, one treasure, one love that organises everything else (CCC 2518). It is not achieved by effort alone but by the grace that gradually simplifies and unifies the heart. Ask for it today. It is the condition of the vision of God, and the vision of God is the destination of everything.

Prayer

Lord Jesus, you ascended the mountain and taught us the law of the Kingdom, written not in stone but in the heart. Give us the purity of heart that sees you, the meekness that inherits the earth, and the hunger for righteousness that you alone can satisfy. Make us salt and light in a world that needs both. Through Christ our Lord. Amen.

5
The Sermon on the Mount
When Jesus saw the crowds, He went up on the mountain and sat down. His disciples came to Him, and He began to teach them, saying:
The Beatitudes
(Psalms 1:1–6; Luke 6:20–23)
 
“Blessed are the poor in spirit,
for theirs is the kingdom of heaven.
Blessed are those who mourn,
for they will be comforted.
Blessed are the meek,
for they will inherit the earth.* 5:5 Or Blessed are those who exercise strength under control, for they will inherit the land; see Psalms 37:11.
Blessed are those who hunger and thirst for righteousness,
for they will be filled.
Blessed are the merciful,
for they will be shown mercy.
Blessed are the pure in heart,
for they will see God.
Blessed are the peacemakers,
for they will be called sons of God.
10 Blessed are those who are persecuted because of righteousness,
for theirs is the kingdom of heaven.
 
11 Blessed are you when people insult you, persecute you, and falsely say all kinds of evil against you because of Me. 12 Rejoice and be glad, because great is your reward in heaven; for in the same way they persecuted the prophets before you.
Salt and Light
(Mark 9:49–50; Luke 14:34–35; Philippians 2:12–18)
 
13 You are the salt of the earth. But if the salt loses its savor, how can it be made salty again? It is no longer good for anything, except to be thrown out and trampled by men.
 
14 You are the light of the world. A city on a hill 5:14 Literally A city lying on a hill cannot be hidden. 15 Neither do people light a lamp and put it under a basket. Instead, they set it on a stand, and it gives light to everyone in the house. 16 In the same way, let your light shine before men, that they may see your good deeds and glorify your Father in heaven.
The Fulfillment of the Law
 
17 Do not think that I have come to abolish the Law or the Prophets. I have not come to abolish them, but to fulfill them. 18 For I tell you truly, until heaven and earth pass away, not a single jot, not a stroke of a pen, will disappear from the Law until everything is accomplished.
 
19 So then, whoever breaks one of the least of these commandments and teaches others to do likewise will be called least in the kingdom of heaven; but whoever practices and teaches them will be called great in the kingdom of heaven. 20 For I tell you that unless your righteousness exceeds that of the scribes and Pharisees, you will never enter the kingdom of heaven.
Anger and Reconciliation
(Luke 12:57–59)
 
21 You have heard that it was said to the ancients, ‘Do not murder’ 5:21 Exodus 20:13; Deuteronomy 5:17 and ‘Anyone who murders will be subject to judgment.’ 22 But I tell you that anyone who is angry with his brother § 5:22 BYZ and TR include without cause. will be subject to judgment. Again, anyone who says to his brother, ‘Raca,’* 5:22 Raca is an Aramaic expression of contempt. will be subject to the Sanhedrin. 5:22 Or the Council But anyone who says, ‘You fool!’ will be subject to the fire of hell. 5:22 Or the hell of fire; Greek the Gehenna of fire
 
23 So if you are offering your gift at the altar and there remember that your brother has something against you, 24 leave your gift there before the altar. First go and be reconciled to your brother; then come and offer your gift.
 
25 Reconcile quickly with your adversary, while you are still on the way to court. Otherwise, he may hand you over to the judge, and the judge may hand you over to the officer, and you may be thrown into prison. 26 Truly I tell you, you will not get out until you have paid the last penny.§ 5:26 Greek kodrantēn; that is, a Roman copper coin worth about 1/64 of a denarius
Adultery
(Leviticus 18:1–30)
 
27 You have heard that it was said, ‘Do not commit adultery.’* 5:27 Exodus 20:14; Deuteronomy 5:18 28 But I tell you that anyone who looks at a woman to lust after her has already committed adultery with her in his heart. 29 If your right eye causes you to sin, gouge it out and throw it away. It is better for you to lose one part of your body than for your whole body to be thrown into hell. 5:29 Greek Gehenna; also in verse 30 30 And if your right hand causes you to sin, cut it off and throw it away. It is better for you to lose one part of your body than for your whole body to depart into hell.
Divorce
(Deuteronomy 24:1–5; Luke 16:18)
 
31 It has also been said, ‘Whoever divorces his wife must give her a certificate of divorce.’ 5:31 Deuteronomy 24:1 32 But I tell you that anyone who divorces his wife, except for sexual immorality, brings adultery upon her.§ 5:32 Or causes her to commit adultery And he who marries a divorced woman commits adultery.
Oaths and Vows
(Numbers 30:1–16)
 
33 Again, you have heard that it was said to the ancients, ‘Do not break your oath, but fulfill your vows to the Lord.’* 5:33 Numbers 30:2 34 But I tell you not to swear at all: either by heaven, for it is God’s throne; 35 or by the earth, for it is His footstool; or by Jerusalem, for it is the city of the great King. 36 Nor should you swear by your head, for you cannot make a single hair white or black. 37 Simply let your ‘Yes’ be ‘Yes,’ and your ‘No,’ ‘No.’ Anything more comes from the evil one. 5:37 Or from evil
Love Your Enemies
(Leviticus 24:17–23; Luke 6:27–36)
 
38 You have heard that it was said, ‘Eye for eye and tooth for tooth.’ 5:38 Exodus 21:24; Leviticus 24:20; Deuteronomy 19:21 39 But I tell you not to resist an evil person. If someone slaps you on your right cheek, turn to him the other also; 40 if someone wants to sue you and take your tunic, let him have your cloak as well; 41 and if someone forces you to go one mile,§ 5:41 Greek one milion; that is, a Roman mile, approximately 4,855 feet or 1,480 meters go with him two miles.* 5:41 Literally go with him two. 42 Give to the one who asks you, and do not turn away from the one who wants to borrow from you.
 
43 You have heard that it was said, ‘Love your neighbor’ 5:43 Leviticus 19:18 and ‘Hate your enemy.’ 44 But I tell you, love your enemies and pray for those who persecute you, 5:44 BYZ and TR love your enemies, bless those who curse you, do good to those who hate you, and pray for those who spitefully accuse you and persecute you; see Luke 6:27–28. 45 that you may be sons of your Father in heaven. He causes His sun to rise on the evil and the good, and sends rain on the righteous and the unrighteous. 46 If you love those who love you, what reward will you get? Do not even tax collectors do the same? 47 And if you greet only your brothers, what are you doing more than others? Do not even Gentiles do the same?
 
48 Be perfect, therefore, as your heavenly Father is perfect.

*5:5 5:5 Or Blessed are those who exercise strength under control, for they will inherit the land; see Psalms 37:11.

5:14 5:14 Literally A city lying on a hill

5:21 5:21 Exodus 20:13; Deuteronomy 5:17

§5:22 5:22 BYZ and TR include without cause.

*5:22 5:22 Raca is an Aramaic expression of contempt.

5:22 5:22 Or the Council

5:22 5:22 Or the hell of fire; Greek the Gehenna of fire

§5:26 5:26 Greek kodrantēn; that is, a Roman copper coin worth about 1/64 of a denarius

*5:27 5:27 Exodus 20:14; Deuteronomy 5:18

5:29 5:29 Greek Gehenna; also in verse 30

5:31 5:31 Deuteronomy 24:1

§5:32 5:32 Or causes her to commit adultery

*5:33 5:33 Numbers 30:2

5:37 5:37 Or from evil

5:38 5:38 Exodus 21:24; Leviticus 24:20; Deuteronomy 19:21

§5:41 5:41 Greek one milion; that is, a Roman mile, approximately 4,855 feet or 1,480 meters

*5:41 5:41 Literally go with him two.

5:43 5:43 Leviticus 19:18

5:44 5:44 BYZ and TR love your enemies, bless those who curse you, do good to those who hate you, and pray for those who spitefully accuse you and persecute you; see Luke 6:27–28.