I was searching the internet for Advent prayers or quotations and I found this website called appleseeds.org which has a compilation of prayers on it from various well-known philosphers or theologians such as Pope John Paul II. I am posting an address of his from 2002.
"The liturgy of Advent…helps us to understand fully the value and meaning of the mystery of Christmas. It is not just about commemorating the historical event, which occurred some 2,000 years ago in a little village of Judea. Instead, it is necessary to understand that the whole of our life must be an ‘advent,’ a vigilant awaiting of the final coming of Christ. To predispose our mind to welcome the Lord who, as we say in the Creed, one day will come to judge the living and the dead, we must learn to recognize him as present in the events of daily life. Therefore, Advent is, so to speak, an intense training that directs us decisively toward him who already came, who will come, and who comes continuously."