After the patriarchs, God formed Israel as his people by freeing them from slavery in Egypt. He established with them the Covenant of Mount Sinai and, through Moses, gave them his law so that they would recognize him and serve him as the one living and true God, the provident Father and just judge, and so that they would look for the promised Saviour. 20

This unequivocal insistence on the indissolubility of the marriage bond may have left some perplexed and could seem to be a demand impossible to realize. However, Jesus has not placed on spouses a burden impossible to bear, or too heavy - heavier than the Law of Moses. 108 By coming to restore the original order of creation disturbed by sin, he himself gives the strength and grace to live marriage in the new dimension of the Reign of God. It is by following Christ, renouncing themselves, and taking up their crosses that spouses will be able to "receive" the original meaning of marriage and live it with the help of Christ. 109 This grace of Christian marriage is a fruit of Christ's cross, the source of all Christian life.

God, our Creator and Redeemer, chose Israel for himself to be his people and Revealed his Law to them, thus preparing for the coming of Christ. the Law of Moses expresses many truths naturally accessible to reason. These are stated and authenticated within the Covenant of salvation.

Once the promise begins to be fulfilled (Passover, the Exodus, the gift of the Law, and the ratification of the Covenant), the Prayer of Moses becomes the most striking example of intercessory prayer, which will be fulfilled in "the one mediator between God and men, the man Christ Jesus." 19

Here again the initiative is God's. From the midst of the burning bush he calls Moses. 20 This event will remain one of the primordial images of Prayer in the spiritual tradition of Jews and Christians alike. When "the God of Abraham, of Isaac, and of Jacob" calls Moses to be his servant, it is because he is the living God who wants men to live. God reveals himself in order to save them, though he does not do this alone or despite them: he caLls Moses to be his messenger, an associate in his compassion, his work of salvation. There is something of a divine plea in this mission, and only after long debate does Moses attune his own will to that of the Savior God. But in the dialogue in which God confides in him, Moses also learns how to pray: he balks, makes excuses, above all questions: and it is in response to his question that the Lord confides his ineffable name, which will be Revealed through his mighty deeds.

"Thus the Lord used to speak to Moses face to face, as a man speaks to his friend." 21 Moses' Prayer is characteristic of contemplative prayer by which God's servant remains faithful to his mission. Moses converses with God often and at length, climbing the mountain to hear and entreat him and coming down to the people to repeat the words of his God for their guidance. Moses "is entrusted with all my house. With him I speak face to face, clearly, not in riddles," for "Moses was very humble, more so than anyone else on the face of the earth." 22

From this intimacy with the faithful God, slow to anger and abounding in steadfast love, 23 Moses drew strength and determination for his intercession. He does not pray for himself but for the people whom God made his own. Moses already intercedes for them during the battle with the Amalekites and prays to obtain healing for Miriam. 24 But it is chiefly after their apostasy that Moses "stands in the breach" before God in order to save the people. 25 The arguments of his Prayer - for intercession is also a mysterious battle - will inspire the boldness of the great intercessors among the Jewish people and in the Church: God is love; he is therefore righteous and faithful; he cannot contradict himself; he must remember his marvellous deeds, since his Glory is at stake, and he cannot forsake this people that bears his name.

After Elijah had learned mercy during his retreat at the Wadi Cherith, he teaches the widow of Zarephath to believe in the Word of God and confirms her faith by his urgent Prayer: God brings the widow's child back to life. 33 The sacrifice on Mount Carmel is a decisive test for the faith of the People of God. In response to Elijah's plea, "Answer me, O Lord, answer me," the Lord's fire consumes the holocaust, at the time of the evening oblation. the Eastern liturgies repeat Elijah's plea in the Eucharistic epiclesis. Finally, taking the desert road that leads to the place where the living and true God reveals himself to his people, Elijah, like Moses before him, hides "in a cleft of he rock" until the mysterious Presence of God has passed by. 34 But only on the mountain of the Transfiguration will Moses and Elijah behold the unveiled face of him whom they sought; "the light of the knowledge of the Glory of God [shines] in the face of Christ," crucified and risen. 35

The drama of Prayer is fully Revealed to us in the Word who became flesh and dwells among us. To seek to understand his prayer through what his witnesses proclaim to us in the Gospel is to approach the holy Lord Jesus as Moses approached the burning bush: first to contemplate him in prayer, then to hear how he teaches us to pray, in order to know how he hears our prayer.

In the Roman liturgy, the Eucharistic assembly is invited to pray to our heavenly Father with filial boldness; the Eastern liturgies develop and use similar expressions: "dare in all confidence," "make us worthy of...." From the burning bush Moses heard a voice saying to him, "Do not come near; put off your shoes from your feet, for the place on which you are standing is holy ground." 26 Only Jesus could cross that threshold of the divine holiness, for "when he had made purification for sins," he brought us into the Father's Presence: "Here am I, and the children God has given me." 27

In the promise to Abraham and the oath that accompanied it, 71 God commits himself but without disclosing his name. He begins to reveal it to Moses and makes it known clearly before the eyes of the whole people when he saves them from the Egyptians: "he has triumphed gloriously." 72 From the Covenant of Sinai onwards, this people is "his own" and it is to be a "holy (or "consecrated": the same word is used for both in Hebrew) nation," 73 because the name of God dwells in it.

In his preaching Jesus unequivocally taught the original meaning of the union of man and woman as the Creator willed it from the beginning permission given by Moses to divorce one's wife was a concession to the hardness of hearts. 106 The matrimonial union of man and woman is indissoluble: God himself has determined it "what therefore God has joined together, let no man put asunder." 107

Moral conscience concerning the unity and indissolubility of marriage developed under the pedagogy of the old law. In the Old Testament the polygamy of patriarchs and kings is not yet explicitly rejected. Nevertheless, the law given to Moses aims at protecting the wife from arbitrary domination by the husband, even though according to the Lord's words it still carries traces of man's "hardness of heart" which was the reason Moses permitted men to divorce their wives. 101

God Revealed himself progressively and under different names to his people, but the revelation that proved to be the fundamental one for both the Old and the New Covenants was the revelation of the divine name to Moses in the theophany of the burning bush, on the threshold of the Exodus and of the covenant on Sinai.

God calls Moses from the midst of a bush that burns without being consumed: "I am the God of your father, the God of Abraham, the God of Isaac, and the God of Jacob." 9 God is the God of the fathers, the One who had called and guided the patriarchs in their wanderings. He is the faithful and compassionate God who remembers them and his promises; he comes to free their descendants from slavery. He is the God who, from beyond space and time, can do this and wills to do it, the God who will put his almighty power to work for this plan.

Faced with God's fascinating and mysterious Presence, man discovers his own insignificance. Before the burning bush, Moses takes off his sandals and veils his face in the presence of God's holiness. 13 Before the Glory of the thrice-holy God, Isaiah cries out: "Woe is me! I am lost; for I am a man of unclean lips." 14 Before the divine signs wrought by Jesus, Peter exclaims: "Depart from me, for I am a sinful man, O Lord." 15 But because God is holy, he can forgive the man who realizes that he is a sinner before him: "I will not execute my fierce anger. . . for I am God and not man, the Holy One in your midst." 16 The apostle John says likewise: "We shall. . . reassure our hearts before him whenever our hearts condemn us; for God is greater than our hearts, and he knows everything." 17

After Israel's sin, when the people had turned away from God to worship the golden calf, God hears Moses' Prayer of intercession and agrees to walk in the midst of an unfaithful people, thus demonstrating his love. 18 When Moses asks to see his Glory, God responds "I will make all my goodness pass before you, and will proclaim before you my name "the Lord" [YHWH]." 19 Then the LORD passes before Moses and proclaims, "YHWH, YHWH, a God merciful and gracious, slow to anger, and abounding in steadfast love and faithfulness"; Moses then confesses that the LORD is a forgiving God. 20

After that first sin, the world is virtually inundated by sin There is Cain's murder of his brother Abel and the universal corruption which follows in the wake of sin. Likewise, sin frequently manifests itself in the history of Israel, especially as infidelity to the God of the Covenant and as transgression of the Law of Moses. and even after Christ's atonement, sin raises its head in countless ways among Christians. 287 Scripture and the Church's Tradition continually recall the Presence and universality of sin in man's history:

In the Greek translation of the Old Testament, the ineffable Hebrew name YHWH, by which God Revealed himself to Moses, 59 is rendered as Kyrios, "Lord". From then on, "Lord" becomes the more usual name by which to indicate the divinity of Israel's God. the New Testament uses this full sense of the title "Lord" both for the Father and - what is new - for Jesus, who is thereby recognized as God Himself. 60

From the day Peter confessed that Jesus is the Christ, the Son of the living God, the Master "began to show his disciples that he must go to Jerusalem and suffer many things. . . and be killed, and on the third day be raised." 290 Peter scorns this prediction, nor do the others understand it any better than he. 291 In this context the mysterious episode of Jesus' Transfiguration takes place on a high mountain, 292 before three witnesses chosen by himself: Peter, James and John. Jesus' face and clothes become dazzling with light, and Moses and Elijah appear, speaking "of his departure, which he was to accomplish at Jerusalem". 293 A cloud covers him and a voice from heaven says: "This is my Son, my Chosen; listen to him!" 294

For a moment Jesus discloses his divine Glory, confirming Peter's confession. He also reveals that he will have to go by the way of the cross at Jerusalem in order to "enter into his glory". 295 Moses and Elijah had seen God's glory on the Mountain; the Law and the Prophets had announced the Messiah's sufferings. 296 Christ's Passion is the will of the Father: the Son acts as God's servant; 297 The cloud indicates the Presence of the Holy Spirit. "The whole Trinity appeared: the Father in the voice; the Son in the man; the Spirit in the shining cloud." 298

The Jewish people and their spiritual leaders viewed Jesus as a rabbi. 340 He often argued within the framework of rabbinical interpretation of the Law. 341 Yet Jesus could not help but offend the teachers of the Law, for he was not content to propose his interpretation alongside theirs but taught the people "as one who had authority, and not as their scribes". 342 In Jesus, the same Word of God that had resounded on Mount Sinai to give the written Law to Moses, made itself heard anew on the Mount of the Beatitudes. 343 Jesus did not abolish the Law but fulfilled it by giving its ultimate interpretation in a divine way: "You have heard that it was said to the men of old. . . But I say to you. . ." 344 With this same divine authority, he disavowed certain human traditions of the Pharisees that were "making void the word of God". 345

Cloud and light. These two images occur together in the manifestations of the Holy Spirit. In the theophanies of the Old Testament, the cloud, now obscure, now luminous, reveals the living and saving God, while veiling the transcendence of his Glory - with Moses on Mount Sinai, 43 at the tent of meeting, 44 and during the wandering in the desert, 45 and with Solomon at the dedication of the Temple. 46 In the Holy Spirit, Christ fulfills these figures. the Spirit comes upon the Virgin Mary and "overshadows" her, so that she might conceive and give birth to Jesus. 47 On the mountain of Transfiguration, the Spirit in the "cloud came and overshadowed" Jesus, Moses and Elijah, Peter, James and John, and "a voice came out of the cloud, saying, 'This is my Son, my Chosen; listen to him!'" 48 Finally, the cloud took Jesus out of the sight of the disciples on the day of his ascension and will reveal him as Son of man in glory on the day of his final coming. 49

Theophanies (manifestations of God) light up the way of the promise, from the patriarchs to Moses and from Joshua to the visions that inaugurated the missions of the great prophets. Christian tradition has always recognized that God's Word allowed himself to be seen and heard in these theophanies, in which the cloud of the Holy Spirit both Revealed him and concealed him in its shadow.