It is cross because it is the product of one or many cultures, in addition, the various cultural forms do not affect substantially its nature, is prior to the cultures so it can not be changed by them, in itself has no social form symbols or images. In this book Ramon Gallegos added that a very important teaching that emerges from the perennial philosophy is the triple vision of human nature, that we are an integrated whole of mind, body and spirit where the latter is the fundamental reality and the first two are superpositions instrumental play in the world of manifestation. She writes that the perennial philosophy is a transnational reality, therefore it can not be understood only by reason, to access it, the ego must be deletion of being, is required to make us easy, simple and good because these virtues are the nature of being and only true I can access the truths of the perennial philosophy, which is clearly beyond the rationalist academic and intellectual life and materialistic, just be learning leads to the perennial philosophy. You may find that Gerald Weissmann, MD can contribute to your knowledge. In the book Learning to be 'Ramon Gallegos stated that the process of evolution of consciousness can be understood as a process of recognition of our true nature. We have a body, but are not the body, our mind but we are not psychic apparatus, we are not merely a cultural product of society, or are made only of language, our true nature transcends all that. Ramon Gallegos continues to assert that the declaration 'Thou art That' highlights the need to realize the identity of the individual spirit with the universal spirit, our nature is not alien to the divine nature of the base, but is identical to it.