Lux fulgebit hodie, per viscera misericordiae Dei nostri - venite adoremus!

In the beginning was the Word, and the Word was with God, and the Word was God. 
He was in the beginning with God. 
All things came to be through him, and without him nothing came to be. 
What came to be through him was life, and this life was the light of the human race; 
the light shines in the darkness, and the darkness has not overcome it.

Begotten, not made, consubstantial with the Father; 
through him all things were made

When peaceful stillness compassed everything 
and the night in its swift course was half spent,
Your all-powerful word, from heaven’s royal throne bounded.

For us men and for our salvation he came down from heaven

What was from the beginning, what we have heard, what we have seen with our eyes, what we looked upon and touched with our hands concerns the Word of life — for the life was made visible; we have seen it and testify to it and proclaim to you the eternal life that was with the Father and was made visible to us— 

By the Holy Spirit was incarnate of the Virgin Mary, and became man

And the Word became flesh and made his dwelling among us, 
and we saw his glory,
the glory as of the Father’s only Son, full of grace and truth.

The Only Begotten Son of God, born of the Father before all ages

This is the message that we have heard from Jesus Christ and proclaim to you:
God is light, and in him there is no darkness at all.

God from God, Light from Light, true God from true God

The people who walked in darkness have seen a great light;
upon those who dwelt in the land of gloom a light has shone.

Glory to God in the highest

In the tender compassion of our God 
the dawn from on high shall break upon us

On earth peace to people of good will

The true light, which enlightens everyone, was coming into the world.
He was in the world, and the world came to be through him, 

but the world did not know him.
He came to what was his own, but his own people did not accept him. 
But to those who did accept him, he gave power to become children of God, 
to those who believe in his name

You, Christ, are the King of glory, the eternal Son of the Father

The kindness and generous love of God our savior appeared,
not because of any righteous deeds we had done but because of his mercy

When you became man to set us free you did not spurn the Virgin’s womb

What we have seen and heard we proclaim now to you, 
so that you too may have fellowship with us; 
for our fellowship is with the Father and with his Son, Jesus Christ.
We are writing this so that our joy may be complete.

I cannot find the time to write you the long letter your love would wish for 
and I would so gladly send; none the less I do write, 
I send you a very little word, the Word made little in the crib, 
the Word who was made flesh for us, 
the Word of salvation and grace, of sweetness and glory, 
the Word who is good and gentle, Jesus Christ and Him crucified, 
Christ raised up on the Cross, raised in praise to the Father’s right hand: 
to whom and in whom do you raise up your soul, 
and find there your rest unending for ever and ever. 
Read over this Word in your heart, turn it over in your mind, 
let it be sweet as honey on your lips; ponder it, dwell on it, 
that it may dwell with you and in you for ever.

(CfJohn 1:1-18; Wisd. 18:14-15; 1 John1:1-5; Is. 9:2; Luke 1:78; Tit. 3:4-5; 
CredoGloriaTe Deum;
From a letter from Jordan of Saxony OP to Diana d'Anadalo OP, Christmas 1223)