Pope Francis called on people in nations built to live a simpler and more materialistic life.
He also condemned the big split between the rich and the poor in the world, saying that the birth of Jesus in poverty in a stable should show everyone in the meaning of life
He spoke while leading a service at St. Peter's Basilica in the Vatican for the traditional Christmas Eve Eve.
This is the sixth Christmas as 82-year-old as the head of the Roman Catholic Church.
In his tribal sermon, Pope Francis said Christ's birth taught in a new way to live "not by waste and storage, but by sharing and giving."
He continued: "Let's ask ourselves: do I have all the material things and complex recipes for living? I can manage without all the unnecessary extras and live a life simpler?
"For many people, the meaning of life is found in existence, having so much material things. A dissatisfaction greed marks all human history, though now, where, different, some eat healthy while all too many have no daily bread needed to survive. "
On Christmas Day on Tuesday, the Pope will give his" Urbi et Orbi "(in the city and the world) a message from the porch of St. Peter's.
Francis, the first Pope from Latin America, made the appearance of the poor main theme of his papacy.
The Mass Day of 2016 warned him that the true meaning of Christmas was drowned by materialism.
] His predecessor Pope Benedict made the same point in 2011.