'No single description or explanatory formula can ever hope to do full justice to every detail of the complex reality of human nature, so it should come as no surprise to us to learn that the different religions and philosophical systems have not all had the same understanding of the structure of the human being. They are all right, but they all have their own particular point of view.
In order to give a clear idea of human anatomy, anatomists have to use a series of different pictures, each of which illustrates one of the systems of the human body: the skeleton, the muscular system, the circulatory system, the nervous system, etc.
Similarly, when initiates want to study one or other aspect of the human being's psychic structure, they use different diagrams or outlines depending on which aspect they are studying'.
Omraam Mikhaël Aïvanhov