We have a very good teacher in our Papa Benedict XVI. This is what he says about Advent and time:
Today, with the First Sunday of Advent, we begin a new liturgical year. This fact invites us to reflect on the dimension of time, which has always greatly fascinated us. Following the example of what Jesus liked to do, I would like to start from a very concrete experience: We all say "I don't have time" because the rhythm of daily life has become too frenetic for everyone. The Church has "good news" to announce about this too: God gives us his time. We always have little time. Especially in regard to the Lord, we do not know how to find him, or, sometimes, we do not want to find him. And yet God has time for us!
This is the first thing that the beginning of a liturgical year makes us rediscover with an ever new wonder. Yes: God gives us his time, because he has entered into history, with his Word and his works of salvation, to open it to eternity, to make it into a covenant history. From this perspective time is already, in itself, a basic sign of God's love. It is a gift that man can, like everything else, appreciate or, on the contrary, squander; he can grasp its meaning, or neglect it with obtuse superficiality.
Read his homily here.