It is probably not too much to say that the hope of progress--moral and intellectual as well as material--in the future is bound up with the fortunes… - James George Frazer

For myth changes while custom remains constant; men continue to do what their did before them, though the reasons on which their fathers acted have been long forgotten.The history of religion is a long attempt to reconcile old custom with new reason, to find a sound theory for an absurd practice.

If we analyze the principles of thought on which magic is based, they will probably be found to resolve themselves into two: first, that like produces like, or that an effect resembles its cause; and, second, that things which have once been in contact with each other continue to act on each other at a distance after the physical contact has been severed. The former principle may be called the Law of Similarity, the latter the Law of Contact or Contagion. From the first of these principles, namely the Law of Similarity, the magician infers that he can produce any effect he desires merely by imitating it: from the second he infers that whatever he does to a material object will affect equally the person with whom the object was once in contact, whether it formed part of his body or not.

When a tree comes to be viewed, no longer as the body of the tree spirit, but simply as its abode which it can quit at pleasure, an important advance has been made in religious thought.