Tree of Life Turquoise Fleur De Lis honoring the symbolic Tree of Life. The concept of a tree of life has been used in science, religion, philosophy, and mythology. A tree of life is a common motif in various world theologies, mythologies, and philosophies. It alludes to the interconnection of all life on our planet and serves as a metaphor for common descent in the evolutionary sense. This print has a turquoise background.