From a homily by St. Leo the Great, pope
(Sermon 51, 3-4, 8: PL 54, 310-311, 313)
The law was given through Moses, grace and truth came through Jesus Christ

The Lord reveals his glory in the presence of chosen witnesses. His body is like that of the rest of mankind, but he makes it shine with such splendor that his face becomes like the sun in glory, and his garments as white as snow.
The great reason for this transfiguration was to remove the scandal of the cross from the hearts of his disciples, and to prevent the humiliation of his voluntary suffering from disturbing the faith of those who had witnessed the surpassing glory that lay concealed.

With no less forethought he was also providing a firm foundation for the hope of holy Church. The whole body of Christ was to understand the kind of transformation that it would receive as his gift. the members of that body were to look forward to a share in that glory which first blazed out in Christ their head.

The Lord had himself spoken of this when he foretold the splendor of his coming: Then the just will shine like the sun in the kingdom of their Father. Saint Paul the apostle bore witness to this same truth when he said: I consider that the sufferings of the present time are not to be compared to the future glory that is to be revealed in us. In another place he says: You are dead, and your life is hidden with Christ in God. When Christ, your life, is revealed, then you also will be revealed with him in glory.

This marvel of the transfiguration contains another lesson for the apostles, to strengthen them and lead them into the fullness of knowledge. Moses and Elijah, the law and the prophets, appeared with the Lord in conversation with him. This was in order to fulfil exactly, through the presence of these five men, the text which says: Before two or three witnesses every word is ratified. What word could be more firmly established, more securely based, than the word which is proclaimed by the trumpets of both old and new testaments, sounding in harmony, and by the utterances of ancient prophecy and the teaching of the Gospel, in full agreement with each other?

The writings of the two testaments support each other. The radiance of the transfiguration reveals clearly and unmistakably the one who had been promised by signs foretelling him under the veils of mystery. As Saint John says: The law was given through Moses, grace and truth came through Jesus Christ. In him the promise made through the shadows of prophecy stands revealed, along with the full meaning of the precepts of the law. He is the one who teaches the truth of the prophecy through his presence, and makes obedience to the commandments possible through grace.

In the preaching of the holy Gospel all should receive a strengthening of their faith. No one should be ashamed of the cross of Christ, through which the world has been redeemed.

No one should fear to suffer for the sake of justice; no one should lose confidence in the reward that has been promised. The way to rest is through toil, the way to life is through death. Christ has taken on himself the whole weakness of our lowly human nature. If then we are steadfast in our faith in him and in our love for him, we win the victory that he has won, we receive what he has promised.

When it comes to obeying the commandments or enduring adversity, the words uttered by the Father should always echo in our ears: This is my Son, the beloved, in whom I am well pleased; listen to him.

From the Catecheses of St. John Chrysostom , bishop
(Cat. 3, 24-27: SC 50, 165-167)
Christ and Moses

The Israelites witnessed marvels; you also will witness marvels, greater and more splendid than those which accompanied them on their departure from Egypt. You did not see Pharaoh drowned with his armies, but you have seen the devil with his weapons overcome by the waters of baptism. The Israelites passed through the sea; you have passed from death to life. They were delivered from the Egyptians; you have been delivered from the powers of darkness. The Israelites were freed from slavery to a pagan people; you have been freed from the much greater slavery to sin.

Do you need another argument to show that the gifts you have received are greater than theirs? The Israelites could not look on the face of Moses in glory, though he was their fellow servant and kinsman. But you have seen the face of Christ in his glory. Paul cried out: We see the glory of the Lord with faces unveiled.

In those days Christ was present to the Israelites as he followed them, but he is present to us in a much deeper sense. The Lord was with them because of the favor he showed to Moses; now he is with us not simply because of your obedience. After Egypt they dwelt in desert places; after your departure you will dwell in heaven. Their great leader and commander was Moses; we have a new Moses, God himself, as our leader and commander.

What distinguished the first Moses? Moses, Scripture tells us, was more gentle than all who dwelt upon the earth. We can rightly say the same of the new Moses, for there was with him the very Spirit of gentleness, united to him in his inmost being. In those days Moses raised his hands to heaven and brought down manna, the bread of angels; the new Moses raises his hands to heaven and gives us the food of eternal life. Moses struck the rock and brought forth streams of water; Christ touches his table, strikes the spiritual rock of the new covenant and draws forth the living water of the Spirit. This rock is like a fountain in the midst of Christ’s table. so that on all sides the flocks may draw near to this living spring and refresh themselves in the waters of salvation.

Since this fountain, this source of life, this table surrounds us with untold blessings and fills us with the gifts of the Spirit, let us approach it with sincerity of heart and purity of conscience to receive grace and mercy in our time of need. Grace and mercy be yours from the only-begotten Son, our Lord and Savior Jesus Christ; through him and with him be glory, honor and power to the Father and the life-giving Spirit, now and always and for ever. Amen.

From a commentary on the psalms by Saint Augustine, bishop
(Ps. 140, 4-6: CCL 40, 2028-2029)
The passion of the whole body of Christ

Lord, I have cried to you, hear me. This is a prayer we can all say. This is not my prayer, but that of the whole body of Christ. Rather, it is said in the name of his body. When Christ was on earth he prayed in his human nature, and prayed to the Father in the name of his body, and when he prayed drops of blood flowed from his whole body. So it is written in the Gospel: Jesus prayed with earnest prayer, and sweated blood. What is this blood streaming from his whole body but the martyrdom of the whole Church?

Lord, I have cried to you, hear me; listen to the sound of my prayer, when I call upon you. Did you imagine that crying was over when you said: I have cried to you? You have cried out, but do not as yet feel free from care. If anguish is at an end, crying is at an end; but if the Church, the body of Christ, must suffer anguish until the end of time, it must not say only: I have cried to you, hear me; it must also say: Listen to the sound of my prayer, when I call upon you.

Let my prayer rise like incense in your sight; let the raising of my hands be an evening sacrifice.

This is generally understood of Christ, the head, as every Christian acknowledges. When day was fading into evening, the Lord laid down his life on the cross, to take it up again; he did not lose his life against his will. Here, too, we are symbolized. What part of him hung on the cross if not the part he had received from us? How could God the Father ever cast off and abandon his only Son, who is indeed one God with him? Yet Christ, nailing our weakness to the cross (where, as the Apostle says: Our old nature was nailed to the cross with him), cried out with the very voice of our humanity: My God, my God, why have you forsaken me?

The evening sacrifice is then the passion of the Lord, the cross of the Lord, the oblation of the victim that brings salvation the holocaust acceptable to God. In his resurrection he made this evening sacrifice a morning sacrifice. Prayer offered in holiness from a faithful heart rises like incense from a holy altar. Nothing is more fragrant than the fragrance of the Lord. May all who believe share in this fragrance.

Therefore, our old nature, in the words of the Apostle, was nailed to the cross with him in order, as he says, to destroy our sinful body, so that we may be slaves to sin no longer.

From the treatise Against Heresies by Saint Irenaeus, bishop
(Lib 4, 14, 2-3; 15, 1: SC 100, 542, 548)
Through foreshadowing of the future, Israel was learning reverence for God and perseverance in his service

From the beginning God created man out of his own generosity. He chose the patriarchs to give them salvation. He took his people in hand, teaching them, unteachable as they were, to follow him. He gave them prophets, accustoming man to bear his Spirit and to have communion with God on earth. He who stands in need of no one gave communion with himself to those who need him. Like an architect he outlined the plan of salvation to those who sought to please him. By his own hand he gave food in Egypt to those who did not see him. To those who were restless in the desert he gave a law perfectly suited to them. To those who entered the land of prosperity he gave a worthy inheritance. He killed the fatted calf for those who turned to him as Father, and clothed them with the finest garment. In so many ways he was training the human race to take part in the harmonious song of salvation.

For this reason John in the book of Revelation says: His voice was as the voice of many waters. The Spirit of God is indeed a multitude of waters, for the Father is rich and great. As the Word passed among all these people he provided help in generous measure for those who were obedient to him, by drawing up a law that was suitable and fitting for every circumstance.

He established a law for the people governing the construction of the tabernacle and the building of the temple, the choice of Levites, the sacrifices, the offerings, the rites of purification and the rest of what belonged to worship.

He himself needs none of these things. He is always filled with all that is good. Even before Moses existed he had within himself every fragrance of all that is pleasing. Yet he sought to teach his people, always ready though they were to return to their idols. Through many acts of indulgence he tried to prepare them for perseverance in his service. He kept calling them to what was primary by means of what was secondary, that is, through foreshadowings to the reality, through things of time to the things of eternity, through things of the flesh to the things of the spirit, through earthly things to the heavenly things. As he said to Moses: You will fashion all things according to the pattern that you saw on the mountain.

For forty days Moses was engaged in remembering the words of God, the heavenly patterns, the spiritual images, the foreshadowings of what was to come. Saint Paul says: They drank from the rock that followed them, and the rock was Christ. After speaking of the things that are in the law he continues: All these things happened to them as symbols: they were written to instruct us, on whom the end of the ages has come.

Through foreshadowings of the future they were learning reverence for God and perseverance in his service. The law was therefore a school of instruction for them, and a prophecy of what was to come.

From the treatise on the psalms by Saint Hilary, bishop
(Ps. 127, 1-3: CSEL 24, 628-630)
The meaning of "the fear of the Lord"

Blessed are those who fear the Lord, who walk in his ways. Notice that when Scripture speaks of the fear of the Lord it does not leave the phrase in isolation, as if it were a complete summary of faith. No, many things are added to it, or are presupposed by it. From these we may learn its meaning and excellence. In the book of Proverbs Solomon tells us: If you cry out for wisdom and raise your voice for understanding, if you look for it as for silver and search for it as for treasure, then you will understand the fear of the Lord. We see here the difficult journey we must undertake before we can arrive at the fear of the Lord.

We must begin by crying out for wisdom. We must hand over to our intellect the duty of making every decision. We must look for wisdom and search for it. Then we must understand the fear of the Lord.

"Fear" is not to be taken in the sense that common usage gives it. Fear in this ordinary sense is the trepidation our weak humanity feels when it is afraid of suffering something it does not want to happen. We are afraid, or are made afraid, because of a guilty conscience, the rights of someone more powerful, an attack from one who is stronger, sickness, encountering a wild beast, suffering evil in any form. This kind of fear is not taught: it happens because we are weak. We do not have to learn what we should fear: objects of fear bring their own terror with them.

But of the fear of the Lord this is what is written: Come, my children, listen to me, I shall teach you the fear of the Lord. The fear of the Lord has then to be learned because it can be taught. It does not lie in terror, but in something that can be taught. It does not arise from the fearfulness of our nature; it has to be acquired by obedience to the commandments, by holiness of life and by knowledge of the truth.

For us the fear of God consists wholly in love, and perfect love of God brings our fear of him to its perfection. Our love for God is entrusted with its own responsibility: to observe his counsels, to obey his laws, to trust his promises. Let us hear what Scripture says: And now, Israel, what does the Lord your God ask of you except to fear the Lord your God and walk in all his ways and love him and keep his commandments, with your whole heart and your whole soul, so that it may be well for you?

The ways of the Lord are many, though he is himself the way. When he speaks of himself he calls himself the way and shows us the reason why he called himself the way: No one can come to the Father except through me.
We must ask for these many ways, to find the one that is good. That is, we shall find the one way of eternal life through the guidance of many teachers. These ways are found in the law, in the prophets, in the gospels, in the writings of the apostles, in the different good works by which we fulfill the commandments. Blessed are those who walk these ways in the fear of the Lord.

From the treatise Against Heresies by Saint Irenaeus, bishop
(Lib 4, 16, 2-5: SC 100, 564-572)
The covenant of the Lord

In the book of Deuteronomy Moses says to the people: The Lord your God made a covenant on Horeb; he made this covenant, not with your fathers but with you. Why did God not make this covenant with their fathers? Because the law is not aimed at the righteous. Their fathers were righteous: they had the power of the Decalogue implanted in their hearts and in their souls. That is, they loved the God who made them and did nothing unjust against their neighbour. For this reason they did not need to be admonished by written rebukes: they had the righteousness of the law in their hearts.

When this righteousness and love for God had passed into oblivion and had been extinguished in Egypt, God had necessarily to reveal himself through his own voice, out of his great love for men. He led the people out of Egypt in power, so that man might once again become God’s disciple and follower. He made them afraid as they listened, to warn them not to hold their Creator in contempt.

He fed them with manna, that they might receive spiritual food. In the book of Deuteronomy Moses says: He fed you with manna, which your fathers did not know, that you might understand that man will not live by bread alone but by every word of God coming from the mouth of God.

He commanded them to love himself and trained them to practise righteousness toward their neighbour, so that man might not be unrighteous or unworthy of God. Through the Decalogue he prepared man for friendship with himself and for harmony with his neighbour. This was to man’s advantage, though God needed nothing from man.

This raised man to glory, for it gave him what he did not have, friendship with God. But it brought no advantage to God, for God did not need man’s love. Man did not possess the glory of God, nor could he attain it by any other means than through obedience to God. This is why Moses said to the people: Choose life, that you may live and your descendants too; love the Lord your God, hear his voice and hold fast to him, for this is life for you and length of days.

This was the life that the Lord was preparing man to receive when he spoke in person and gave the words of the Decalogue for all alike to hear. These words remain with us as well; they were extended and amplified through his coming in the flesh, but not annulled.

God gave to the people separately through Moses the commandments that enslave: these were precepts suited to their instruction or their condemnation. As Moses said: The Lord commanded me at that time to teach you precepts of righteousness and of judgement. The precepts that were given them to enslave and to serve as a warning have been cancelled by the new covenant of freedom. The precepts that belong to man’s nature and to freedom and to all alike have been enlarged and broadened. Through the adoption of sons God had enabled man so generously and bountifully to know him as Father, to love him with his whole heart, and to follow his Word unfailingly.

From the treatise on Flight from the World by Saint Ambrose, bishop
(Cap. 6, 36; 7, 44: 8, 45; 9,52: CSEL 32, 192, 198-199, 204)
Hold fast to God, the one true good

Where a man’s heart is, there is his treasure also. God is not accustomed to refusing a good gift to those who ask for one. Since he is good, and especially to those who are faithful to him, let us hold fast to him with all our soul, our heart, our strength, and so enjoy his light and see his glory and possess the grace of supernatural joy. Let us reach out with our hearts to possess that good, let us exist in it and live in it, let us hold fast to it, that good which is beyond all we can know or see and is marked by perpetual peace and tranquillity, a peace which is beyond all we can know or understand.

This is the good that permeates creation. In it we all live, on it we all depend. It has nothing above it; it is divine. No one is good but God alone. What is good is therefore divine, what is divine is therefore good. Scripture says: When you open your hand all things will be filled with goodness. It is through God’s goodness that all that is truly good is given us, and in it there is no admixture of evil.

These good things are promised by Scripture to those who are faithful: The good things of the land will be your food.

We have died with Christ. We carry about in our bodies the sign of his death, so that the living Christ may also be revealed in us. The life we live is not now our ordinary life but the life of Christ: a life of sinlessness, of chastity, of simplicity and every other virtue. We have risen with Christ. Let us live in Christ, let us ascend in Christ, so that the serpent may not have the power here below to wound us in the heel.

Let us take refuge from this world. You can do this in spirit, even if you are kept here in the body. You can at the same time be here and present to the Lord. Your soul must hold fast to him, you must follow after him in your thoughts, you must tread his ways by faith, not in outward show. You must take refuge in him. He is your refuge and your strength. David addresses him in these words: I fled to you for refuge, and I was not disappointed.

Since God is our refuge, God who is in heaven and above the heavens, we must take refuge from this world in that place where there is peace, where there is rest from toil, where we can celebrate the great sabbath, as Moses said: The sabbaths of the land will provide you with food. To rest in the Lord and to see his joy is like a banquet, and full of gladness and tranquillity.

Let us take refuge like deer beside the fountain of waters. Let our soul thirst, as David thirsted, for the fountain. What is that fountain? Listen to David: With you is the fountain of life. Let my soul say to this fountain: When shall I come and see you face to face? For the fountain is God himself.