Thanks Huseng for that information.
Probably, because I was in a hurry when I started this topic, I didn't explain exactly what I wanted clearly enough.
That was my fault.
Let me see if I can make what I'm looking for any clearer.
I began with Zen as my introduction to Buddisim. I've "studied" or practiced Zen for roughly a decade. I guess you coild say that's been the core of ny study of Buddhisim.
I happen to live in Thailand now, and therefore I'm being exposed to Theravada...and finding things there that are little "flowers" or gems of understanding that I missed there before.
I've dabbled around in some of the aspects of Mahayana also, and there are clearly some gems of understanding there too.
Vajrayana is something I've just been introduced to...and that looks interesting also, at least at first glance.
I know I've bounced around a lot, and I'm aware that along the way there are many "flowers" that I missed.
One of the concepts that I just heard in passing was the idea of the
"turning of the wheel of the Dharma in the heart"...and with that the concept of the "further turnngs of the wheel" in the heart.
In this explanation the "first turning of the wheel in the heart" is Theravada, the 2nd turning in the heart is Mahayana, and the supposed 3rd turning is in Vajrayana.
But I am only repeating what is my somewhat confused undersatnding of what was said there.
That is why I'm looking for information and some clarification on this matter.
That's why I'm asking for information.

Shame on you Shakyamuni for setting the precedent of leaving home.
Did you think it was not there--
in your wife's lovely face
in your baby's laughter?
Did you think you had to go elsewhere (simply) to find it?
from - Judyth Collin
The Layman's Lament
From What Book, 1998, p. 52
Edited by Gary Gach