Describe symbolism in The Dance of the Dissident Daughter: A Woman's Journey from Christian Tradition to the Sacred Feminine by Sue Monk Kidd

From the text:

"Another woman who was a student of ancient mythology told us that the turtle was a feminine symbol of strength and wisdom. 'Did you know that in some ancient cultures the turtle shell was considered the base and support of the universe? It was said the whole world axis sat on her back."