I have written a fair but about Primary Thinking in an attempt to clarify what Owen Barfield meant by Final Participation.
The difficulty with the 'thinking' aspect of the term, is that most of thinking is not primary - and I have felt a misleading temptation to strive to attain a new and different 'method' of thinking - perhaps a meditation technique. I know this is an error, and method/ technique is not a path to wisdom - but the call to change the mode of thinking seems to lead in that direction...
I am currently finding it more helpful to think of what I am aiming at in terms of Intuitive Knowing, with a metal emphasis on the 'ing' aspect of knowing - that intuitively know-ing something is not a thing static and categorical, but an active process; the attribute of a conscious Being.
And, for me, Intuitive Knowing is a proper goal however is may be achieved, by whatever method or technique or by none at all. I need to know intuitively - that is the goal; and how this best happens may vary widely or open-endedly according to the unique situation.
My understanding is that - in life - there is a lot which we 'know' in a shallow, contingent, secondhand fashion; but that the aim is to base all knowledge, thought, action on only that which we know directly and intuitively - know for our-selves, from that of us which is divine.
In this mortal life, intuitive knowing only happens sometimes and temporarily - it cannot be attained as a permanent state. That is sad but not tragic; because this mortal life (for those of us who have it, the minority of Men who survive the womb and early childhood) is a time of experiencing and learning - a vital yet transitional phase.
This mortal life is a time of change - the one thing impossible is any fixed state of Being. Fixity is not an option. This situation intrinsically maximises our experience; we must keep learning, because we always keep experiencing change.
Since I am still alive, I have more that I ought-to learn; more situations in which I need to discern and rely-upon direct and intuitive knowing. Beyond death - if I actively wish it - I could live eternally in a state where intuitive knowing is the norm.
But clearly, for me, there is value in continuing to live here, now, in my situation; because there are things that I can learn best in mortality.
My conclusion is that I should seek intuitive knowing; but should not despair that it is an exceptional state that cannot be held-onto. Not holding-onto is one of the things I must learn.