Nearly all the sacred books of the world can be traced in anatomical analogy. This is most evident in their creation myths.
Proceeding from this assumption of the first theologians that man is actually fashioned in the image of God, the initiated minds of past ages erected the stupendous structure of theology on the foundation of the human body. The religious world of today is almost totally ignorant of the fact that the science of biology is the fountainhead of its doctrines and tenants. Many of the codes and laws believed by modern divines to have been direct revelations from Divinity are in reality the fruitage of ages of patient delving into the intricacies of the human constitution and the infinite wonder is revealed by such a study.
Christianity itself may be cited as an example.
The entire New Testament is in fact an ingenuously concealed exposition of the secret processes of human regeneration. The characters so long considered as historical men and women are really the personification of certain processes which take place in the human body when man begins the task of consciously liberating himself from the bondage of ignorance and death.
Manly P. Hall
The Divine Power

