Tree of life

stood also in the midst of the garden of Eden (Gen. 2:9; 3:22).
Some writers have advanced the opinion that this tree had some
secret virtue, which was fitted to preserve life. Probably the
lesson conveyed was that life was to be sought by man, not in
himself or in his own power, but from without, from Him who is
emphatically the Life (John 1:4; 14:6). Wisdom is compared to
the tree of life (Prov. 3:18). The "tree of life" spoken of in
the Book of Revelation (Rev. 2:7; 22:2, 14) is an emblem of the
joys of the celestial paradise.