“Enq: In the days of Ammonius there were several ancient great religions, and numerous were the sects in Egypt and Palestine alone. How could he reconcile them?
Theo: By doing which we again try to do now. The Neo-Platonists were a large body, and belonged to various religious philosophies; so do our Theosophists.
In those days, the Jew Aristobulus affirmed that the ethics of Aristotle represented the esoteric teachings of the law of Moses; Philo Judaeus endeavored to reconcile the Pentateuch with the Pythagorean and Platonic philosophy; and Josephus proved that the Essenes of Carmel were simply the copyists and followers of the Egyptian Therapeutae (the healers). So it is in our day.
We can show the line of descent of every Christian religion, as of every, even the smallest, sect. The latter are the minor twigs or shoots grown on the larger branches; but shoots and branches spring from the same trunk – the WISDOM-RELIGION.
To prove this was the aim of Ammonius, who endeavored to induce Gentiles and Christians, Jews and Idolators, to lay aside their contentions and strifes, remembering only that they were all in possession of the same truth under various vestments, and were all the children of a common mother.
(Says Mosheim of Ammonius: “Conceiving that not only the philosophers of Greece, but also all those of the different barbarian nations, were perfectly in unison with each other with regard to every essential point, he made it his business so to expound the thousand tenets of all these various sects as to show they had all originated from one and the same source, and tended all to one and the same end.”
If the writer on Ammonius in the Edinburgh Encyclopedia knows what he is talking about, then he describes the modern Theosophists, their beliefs, and their work, for he says, speaking of the Theodidaktos: “He adopted the doctrines which were received in Egypt (the esoteric were those of India) concerning the Universe and the Deity, considered as constituting one great whole; concerning the eternity of the world…and established a system of moral discipline which allowed the people in general to live according to the laws of their country and the dictates of nature, but required the wise to exalt their mind by contemplation.”)
This is the aim of Theosophy likewise.”
H. P. Blavatsky
The Mark Of God: Understanding Your "I AM Presence" 