« No single description or explanation can 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 human structure. They are all right, but they all have their own particular point of view.

In order to give a clear idea of human anatomy one is obliged to have recourse to a series of different plates, each of which illustrates one of the systems of the human body : the skeleton, the muscular system, the circulatory system, the nervous system, and so on. Similarly, when an initiate studies one or other aspect of the human psychic structure, he applies the same method as an anatomist : he uses different diagrams or outlines depending on which aspect he is studying. » Omraam Mikhaël Aïvanhov