The Tree of Life is a Celtic symbol representing the belief that trees had several powers and provided people with food, shelter and warmth. Different life forces including insects and animals took shelter in these trees. These creatures were in turn sustained by the Tree of Life. The symbol of Celtic tree of life has been preserved for centuries and is portrayed in various ways today. Different parts of this tree are assigned specific meanings. Roots of Tree of Life are considered to be the foundation and they symbolize the other world. Trunk of this tree joins branches and roots. It is therefore associated with the mortal world. The branches connect different worlds that are present above and below. The reason behind Celtic tree of life being revered is that 'Nature' is worshiped through this symbol.