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1 The Tree of Life represents the balance and harmony in nature. 2  To the Celts, the Tree of Life symbol meant wisdom, strength and a long life.  The Tree of Life represents rebirth, just as a tree will shed its leaves in the fall, hybernate in the winter, and be ârebornâ with new leaves in the spring.
Tree of life (biology) - Darwin. 1  Charles Darwin (1809â1882) used the concept of a tree of life in the context of his theory of evolution. 2  The affinities of all the beings of the same class have sometimes been represented by a great tree. 3  The meaning and importance of Darwin's use of the tree of life metaphor have been extensively discussed.