I recommend the works of Stanislav and Christina Grof on the subject and their transpersonal and holistic approach towards healing
I'm still reading stuff from the Bible, the Bhagavad Gita, the Quaran and stuff from the Tenach. As said above I think that nondualism, the Buddhist approach seems for me the most interesting because it gives me inner peace and outer peace. Ken Wilber sees it as an important spiritual realisation to strive for. The teachings from Manly P. Hall, the mystic masonic philosopher are stil a great help for my own personal progress and understanding.
|Source : A Treatise on Cosmic Fire - Alice Bailey (published in 1925) - Section Two - Division D - Thought Elementals and Fire Elementals|
|d. On the Building of the Causal Body|
We enter now upon one of the most vitally practical parts of our Treatise on Fire, that which deals with the building of the causal body, or body of manifestation of the Ego. It concerns the work of the solar Angels, or the true self-conscious Identity, man. If the student has in any way apprehended the general trend of the earlier pages, he will now be in a condition of mind which will enable him to interpret all that is said in terms of energy, or of that vibratory activity which is produced by the three major phases of electrical phenomena, the union which produces that divine manifestation called Man, or, when the aggregated units are considered, the human kingdom.
(a) Introductory Remarks
We have studied somewhat the constitution of the Triangles, or Pitris, Who, through self-sacrifice, endow man with self-consciousness, building his egoic vehicle out of Their own essence. We  have touched briefly upon the lunar Pitris, who endow man with his lower sheaths and principles through which the energy of the solar Lords may make itself felt, and we shall now proceed to study three things:
It will not be possible to do more than indicate broad general lines of development. The subject of egoic evolution cannot be fully comprehended until after initiation, but it is felt now by the Teachers on the inner side that the main principles had better be given out at once in view of the unexpected development (since the opening of this century) of two great sciences:
II. Man is in fact a fragment of the Universal Mind, or world soul, 60 and as a fragment is thus partaker of the instincts and quality of that soul, as it manifests through the human family. Therefore, unity is only possible upon the plane of mind. This, if true, must lead to the tendency to develop within the physical brain a conscious realization of group affiliations on the mental plane, a conscious recognition of group relationships, ideals and goal, and a conscious manifestation of that continuity of consciousness which is the object of evolution at this time. It will further produce the transference of the race consciousness from the physical plane to the mental, and a consequent solving through "knowledge, love, and sacrifice" of all present problems. This will bring about emancipation from the present physical plane disorder. It must lead to the education of the public as to the nature of man, and the development of the powers latent within him - powers which will set him free from his present limitations, and which will produce in the human family a collective repudiation of. the present conditions. When men everywhere recognize themselves and each other, as divine self-conscious units, functioning primarily in the causal body but utilizing the three lower vehicles only as a means of contact with the three lower planes, we will have government, politics, economics and the social order readjusted upon sound, sane and divine lines.
59 Each human being is an incarnation of God. - S. D., III, 449.
It is essential that in days to come medical men should realize that disease in the physical body is incidental to wrong internal conditions. This is already being somewhat considered but the whole question will remain but a beautiful theory (even though an incontrovertible one in view of the achievements of mental scientists and of the various faith healers) until the true nature of the ego, its constitution, its powers, and its field of influence are duly apprehended.
- Man's truer understanding of his own animal nature.
- A comprehension of the laws of individualization, and the effect of the influence of the fourth, or human, kingdom upon the third, or animal, kingdom.
- The work of an Avatar of a lesser order Who will come in the beginning of the next century to reveal to man his relationship to the third kingdom. His way is being prepared by the many who in these days are developing public interest through the  various societies for the benefit and protection of animals, and through the many stories to be found in books and current periodicals.