An accreted historical syncretism
, and chutzpah
What modern practitioners sometimes refer to as a unitary "tradition" is the result of centuries of mystics picking and choosing deities, symbols, rituals, and ideas from literally dozens of disparate cultures and traditions.
Thelema (the basis of A∴A∴, which Otto Omicron mentions) and its forerunner the Golden Dawn, for instance, incorporate aspects of:
... plus appropriate bits of Yoga
, and Zen
as understood by 19th-century Englishmen. The chutzpah
comes in when folks like Israel Regardie
or Aleister Crowley
construct tables of correspondence
among the symbols of all the above systems, summarizing a few thousand years of several cultures' religions and mysticisms into one great surreal multiplication table
(Even the less esoteric of today's occult groups -- the neopagans, for instance -- cheerfully fuse many historically separate traditions into a thoroughly modern syncretism. A chant to Kore (aka Persephone) is accompanied by Native American drumming and followed by an invocation to Freya or Brighid.)
There is, of course, nothing whatsoever wrong with practicing syncretism, and potentially a great deal right with it. The collection of memes from disparate sources greatly enhances each individual's ability to find useful or accurate memes. I suspect, though, that it is a historical error to claim that your (or your teacher's) particular favorites of the beliefs and practices of the human race's last few thousand years constitute a single unbroken tradition.