The tree of life is an ancient symbol that has crossed cultures and religions for thousands of years. It represents knowledge, wisdom, and the interconnection of all life. In many ancient cultures, the tree of life was a motif used to embody a doorway between one place of existence from another. Whether it was death and life, or the tangible and the spiritual, these cultures used the pictorial iconography of the tree to better define the shape of their world as they knew it to be.