i don't recall anything about a 90% turn - rings a bell, but you will have to locate that reference for me.
2 just happens to be in the middle between 1 and 3, so a confusion arises.
1st world = 3 dimensional (ie. with two eyes we see distance - this and that, and here and there).
2nd world = 2 dimensional (ie a picture world, duality - this and that, which is what pictures are about)
3rd world = 1 dimensional (ie perception without pictures, non-duality, no comparisons)
don't get into a flap about that - it's just a way of talking.
what i think you are asking is how we move from the 2nd to the 3rd world. First, we do it when the astral body dies. But we also do it all the time - we have to be connected to the 3rd world or we wouldn't exist. The issue always is how to extend awareness from the 1st through the 2nd and into the 3rd.
This is what DJ referred to as warriors of the 3rd attention. 3rd world is also known as the Sephirah Kether in the Kaballah, or Brahman in Hinduism - sometimes also associated with Shiva.
Hinduism has the best tools of thought to help understand. Brahman is 'without attributes', meaning it is unknowable, in our understanding of knowing.
3rd attention means extending our attention into the 3rd world. Hinduism calls this moksha. It is worth noting that the entirety of Hindu thought in almost all it's variations, is dedicated to moksha - that's what it's all about. And so is it's 'reformation' Buddhism. Also, one could argue, is what is referred to as Philosophical Taoism, and Esoteric Taoism, but definitely not Popular Taoism.
Neither Judiasm, Christianity or Islam (the Abrahamic Religions) have any interest in this concept at all, aside from placing the Sephirah Kether at the top of the tree in Esoteric Judiasm - and one could also argue Northen Sufism has similar interests. But these are not within the orthodox religious field of any Abrahamic religion.
Toltec is dedicated to this concept, but only as part of it's third wave - a later development.
How to shift into the 3rd attention? Rudolf Steiner actually mapped it - he gave some early phases just passed the doorway, so to speak. I can't remember exactly, but they included things like intention.
There are two ways - direct and long.
Direct is absolute silence - the deepest experience of absolute silence you can possibly plumb.
Long is the journey, of mastery of passage. I mean you only need to master sufficient to pass through. Passage through the 1st and 2nd worlds. This means using the 1st and 2nd worlds - developing effectiveness in - to enter the 3rd world as a consequence of evolution of being - transformation.
It is my opinion that the long is the main task, but it also incorporates the direct. I am suspicious that the direct path can ever really be effective on its own. That is why i launched into the world, instead of retiring to a zen monastery. The problem with the long is that we get side-tracked along the way, and forget we are only passing through (a great song btw).
now we get into an area that preoccupies my attention considerably. I'll just say that at some point, the long is demonstrated beyond a shadow of doubt to be impossible, futile. It simply can't be done. I have a song about that myself ("There's only one thing that you can cling to, and you won't find it no matter what you do.")
This is where we cast ourselves upon the mercy of the Bird. The active principle of Spirit. that does not mean we give up our own efforts.
It is like we are ascending a building, and each floor has steps leading to the next floor. But the the final steps to the roof of the building are missing. There are no steps for the last section.
