Advent is about the many ways in which the Lord comes.
He came historically at Bethlehem in the fullness of time. In the liturgical year he comes to us sacramentally. He will come again at the end of the world as Judge of the living and the dead. Christ comes to us also in the consecration of the Body and Blood of Christ Mass and, in a special way in Holy Communion. He comes in the person of the priest, who is alter Christus, another Christ. He comes in the words of Holy Scripture. He also comes in the person of our neighbor, especially those who are in need of the spiritual and corporal works of mercy.