Today’s reading is from the beginning of the Gospel of Mark.
The beginning of the Good News about Jesus Christ, the Son of God. It is written in the book of the prophet Isaiah:
Look, I am going to send my messenger before you;
he will prepare your way.
A voice cries in the wilderness:
Prepare a way for the Lord, make his paths straight.

Our Advent Journey begins with the Gospel reading from Mark 13:33-37

Jesus said to his disciples:”Be watchful! Be alert! You do not know when the time will come. It is like a man traveling abroad. He leaves home and places his servants in charge, each with his own work, and orders the gatekeeper to be on the watch. Watch, therefore; you do not know when the Lord of the house is coming, whether in the evening, or at midnight, or at cockcrow, or in the morning. May he not come suddenly and find you sleeping.
What I say to you, I say to all: ‘Watch!'”