In Celtic mythology, the oak tree symbolizes strength, endurance, and wisdom. Often regarded as a sacred tree, it is associated with fertility and the protective spirits of the forest. The oak serves as a connection between the earthly and the divine, representing stability in changing times. It also holds a prominent role in rituals and is linked to various Celtic deities. As a symbol of longevity and permanence, the oak tree embodies the strength of the Celtic identity and spirituality.