Now will I rise up, says the LORD, now will I be exalted, now be lifted up.
You conceive dry grass, bring forth stubble; my spirit shall consume you like fire.
The peoples shall be as in a limekiln, like brushwood cut down for burning in the fire.
Hear, you who are far off, what I have done; you who are near, acknowledge my might.
On Zion sinners are in dread, trembling grips the impious: "Who of us can live with the consuming fire? who of us can live with the everlasting flames?"
He who practices virtue and speaks honestly, who spurns what is gained by oppression, Brushing his hands free of contact with a bribe, stopping his ears lest he hear of bloodshed, closing his eyes lest he look on evil--
He shall dwell on the heights, his stronghold shall be the rocky fastness, his food and drink in steady supply.
Your eyes will see a king in his splendor, they will look upon a vast land.
Your mind will dwell on the terror: "Where is he who counted, where is he who weighed? Where is he who counted the towers?"
To the people of alien tongue you will look no more, the people of obscure speech, stammering in a language not understood.
Look to Zion, the city of our festivals; let your eyes see Jerusalem as a quiet abode, a tent not to be struck, Whose pegs will never be pulled up, nor any of its ropes severed.
Indeed the LORD will be there with us, majestic; yes, the LORD our judge, the LORD our lawgiver, the LORD our king, he it is who will save us.
- Jesus said, "Do not think that I have come to abolish the law or the prophets. I have come not to abolish but to fulfill. Amen, I say to you, until heaven and earth pass away, not the smallest letter or the smallest part of a letter will pass from the law, until all things have taken place. Therefore, whoever breaks one of the least of these commandments and teaches others to do so will be called least in the kingdom of heaven. But whoever obeys and teaches these commandments will be called greatest in the kingdom of heaven. I tell you, unless your righteousness surpasses that of the scribes and Pharisees, you will not enter into the kingdom of heaven."Matthew 5:17-20
The first "O Antiphon" speaks of wisdom and how it created order from the chaos. It was the first time the Word was heard clearly and obediently. Even though Adam and Eve disobeyed (did not hear), God would not abandon the crowning glory of His creation to death. There were always glimmers of hope in early salvation history when the Word was more than an echo, for example, when Noah and Abraham obeyed the commands given them by God.
It was, however, time for the Word to become, in a sense, visible.
God was once again speaking His Word, this time through a mouthpiece which only knew how to stutter. The strange and awesome sight of the burning bush, where and when the Word revealed His name for the first time, was just the opening dialog. The ten plagues was a not so subtle way of getting everyone's attention. The parting of the Red Sea was just an exclamation point.
Now, fast forward to Mount Sinai.
The Word was about to become, in a sense, visible.
Recall the scene from the Book of Exodus. God came as a dense cloud. This holy mountain shook from the conversation between God and Moses. The Chosen People were commanded to worthily prepare themselves. Then, on the third day, when God finished speaking to Moses, He then spoke to the Israelites through Moses.
God gave them the Decalogue.
The Word became, in a sense, visible.
Despite it being "ten words" on stone tablets, it is still the undivided Word.
O Adonai, et Dux domus Israel, qui Moysi in igne flammae rubi apparuisti, et ei in Sina legem dedisti: veni ad redimendum nos in brachio extento.
O Adonai, and Ruler of the house of Israel, Who didst appear unto Moses in the burning bush, and gavest him the law in Sinai, come to redeem us with an outstretched arm!
For further reflection, go here.