WHAT IT IS
Some yoga instructors base their teachings on the yoga sutras and the Hatha Yoga Pradiprika.
Dharma Mittra bases his on the Bhagavad Ghita.
He says all the answers are in there.
I think he's right.
When asked about the spiritual path or negative thoughts, Pattabhi Jois sometimes says, "Think God. Be God."
But he doesn't really explain how (at least not to me, anyway).
Dharma explains exactly how, via kriya, mantra, meditation, thought control, etc.
He does it without reservation.
But essentially the idea is exactly the same.