Gospel MK 1:1-8
The beginning of the gospel of Jesus Christ the Son of God.
As it is written in Isaiah the prophet:
Behold, I am sending my messenger ahead of you;
he will prepare your way.
A voice of one crying out in the desert:
“Prepare the way of the Lord,
make straight his paths.”
John the Baptist appeared in the desert
proclaiming a baptism of repentance for the forgiveness of sins.
People of the whole Judean countryside
and all the inhabitants of Jerusalem
were going out to him
and were being baptized by him in the Jordan River
as they acknowledged their sins.
John was clothed in camel’s hair,
with a leather belt around his waist.
He fed on locusts and wild honey.
And this is what he proclaimed:
“One mightier than I is coming after me.
I am not worthy to stoop and loosen the thongs of his sandals.
I have baptized you with water;
he will baptize you with the Holy Spirit.”
https://bible.usccb.org/bible/readings/121023.cfm
“As the journey of Advent continues, as we prepare to celebrate the nativity of Christ, John the Baptist's call to conversion sounds out in our communities. It is a pressing invitation to open our hearts and to welcome the Son of God Who comes among us to make divine judgement manifest. The Father, writes St. John the Evangelist, does not judge anyone, but has entrusted the power of judgement to the Son, because He is the Son of man.
“And it is today, in the present, that we decide our future destiny. It is with our concrete everyday behavior in this life that we determine our eternal fate. At the end of our days on earth, at the moment of death, we will be evaluated on the basis of our likeness or otherwise to the Baby Who is about to be born in the poor grotto of Bethlehem, because He is the measure God has given humanity.
“Through the Gospel John the Baptist continues to speak down the centuries to each generation. His hard clear words bring health to us, the men and women of this day in which even the experience and perception of Christmas often, unfortunately, reflects materialist attitudes. The 'voice' of the great prophet asks us to prepare the way for the coming Lord in the deserts of today, internal and external deserts, thirsting for the water of life which is Christ.”
— Benedict XVI