"The traditional Christmas tree is a very ancient custom which exalts the value of life, as in winter the evergreen becomes a sign of undying life. In general the tree is decorated and Christmas gifts are placed under it. The symbol is also eloquent from a typically Christian point of view: it reminds us of the 'tree of life' (Genesis 2:9), representation of Christ, God's supreme gift to humanity. The message of the Christmas tree, therefore, is that life is 'ever green' if one gives: not so much material things, but of oneself: in friendship and sincere affection, and fraternal help and forgiveness, in shared time and reciprocal listening."
Pope St. John Paul II
Illustration by unknown artist, in US public domain due to age