It is a little-known fact that there are multiple theosophies in this world.
I suppose that theosophers are aware of the close affinity of Vedanta with Blavatskian theosophy, and, that some relation to Buddhism exists with her eclectic philosophy. But, there is so much more in the world than these systems of thought alone. Have you ever thought that there can be found many theosophies in the West? Yes, there are many such.
A list of the most important ones:
-Greek theosophy (especially Proclus). Acknowledged by De Purucker.
-Jewish theosophy: Kabbalah. Recognized by Blavatsky.
-Teutonic theosophy (Jakob Boehme). Recognized by Blavatsky and Quan Judge.
-Celtic theosophy as found in the prose and poems of Druidic bards. Acknowledged by De Purucker.
-Gnostic philosophy as formulated by Vitvan. Certainly acknowledged by me as a valuable system, very cognate to Theosophy.
You see, there is a virtual goldmine here to be explored.
I have personally made all the major works of Jacob Boehme available as texts on my scribd account
and the same goes for the great theosopher Proclus. Together more than 5,000 pages of text.
As to the other systems: Celtic theosophy can be found in the sacred-texts archive and Vitvan on www.sno.org
It will hardly come as a surprise that there are many recurrent themes to be found in these theosophies; themes on which there is much agreement as to how nature operates (which "laws" or principles are at work); agreement as to ethical standards, purification of soul, etc.
What is slightly surprising, however, is that there has been done relatively little study on these systems, comparing ideas, extracting models of natural process, etc.
One of the few theosophers who has done this a bit, is G.R.S. Mead.
Other names are James Morgan Pryse (Greek theosophy and Christianity), Alvin Boyd Kuhn (Greek theosophy, Egyptian religion and Christianity), Franz Hartmann (on Boehme and Paracelsus). But these were people born in the 19th century! What happened to the T.S. movement in the first half of the 20th century??? Well, we do know a bit of the desastrous developments that took place there, so, no need to repeat that. One century has been almost lost, hopefully the 21st century will see some new developments.
So, here is a goldmine of information to be explored. Hopefully some dynamic, young, or seasoned guys and girls, will see an opportunity to do some comparitive research as per the second object of the T.S.
It may lead to a revitalized theosophy. My own interest lies with extracting simple models for bio-psychological process. Maybe more about that later.
Anyone interested, and which true theosopher wouldn't be? - have a go at it!