While the Bible does not mention Christmas trees specifically, it does mention the importance of celebrating the birth of Christ and the various traditions that have developed over time to commemorate the occasion. Many of these traditions have included the use of evergreens and other plants, such as Christmas wreaths and mistletoe, to symbolize the eternal life that Christ brought to the world. So while the Bible does not mention Christmas trees, it does encourage the celebration of Christ's birth in a variety of ways, which could include decorating an evergreen tree.