The problem that concerns him is the central problem that all human beings have, that of trying to discover who and what we really are. Until we have resolved this problem, a problem that lurks as the deeply buried core of unease in our mind, we are more than likely to suffer stress and a whole lot of other things too.
In our efforts to resolve this central problem, many turn to the study the ancient wisdom texts because we feel they may be able to help us understand who and what we are. But what we quickly discover is that these ancient texts, whether Zen such as Seng-ts'an's 'Hsin-hsin-ming,' or Buddhist such as the Prajnaparamita 'Heart Sutra,' or Vedantic such as the 'Ashtavakra Gita' (or 'Astavakra Samhita') even when quite short, as these three are, are by no means easy to understand. One could easily spend a lifetime studying the original texts, their translations and commentaries, and still end up no wiser. Ultimately, what they demand is not so much understanding as insight. What is Brahman, or Emptiness, or Seng-ts'an's 'Not-Two'? How does one really find out?
Traditionally one approaches a Master, attends to his words, and practises meditation. Then, after prolonged meditation, insight may come. But not everyone can avail themself of a Master. Some of us have to make do with texts. And meditation can take years. And we are busy and harassed modern folks. Is there a simpler, easier, faster way of arriving at insight? Amazingly, there is. If you really want to grasp what all the great Indian and Tibetan and Chinese and Japanese Masters and Sages and Rishis have been trying to convey to their disciples down through the centuries, all you need do is read this book.
Why, after these thousands of years, it should have been left to an Englishman to discover a simple mental act, an act which anyone can perform anywhere at any time and which unlocks the mystery of 'Not-Two,' I have no idea. But after spending more than twenty years puzzling my head over Eastern texts before finally discovering Harding, I can assure you that his instructions for "reversing the arrow of attention" really do work. His are the most important books I have ever read.
Attention is a bit like a compass. The act of attention which you are bringing to bear on these words as you read them is like the compass needle. Just as the needle always points North, your attention is almost always pointing here, out here. You give no thought to this. But the answer you seek is not out here.
Make Harding your Master. Let him neatly sever your head. You will quickly find that the 'Not-Two' is not a mystery any more. For by following his simple instructions you will have become it. You will also, needless to say, have put all stress behind you - forever.