The book indicates some kind of knowledge.
You asked for the understanding and the way out and at once Krishna showed you both, the way out was the change of the consciousness within, the plasticity which makes the knowledge possible and also the understanding of the condition of mind and vital in which the true knowledge or power of knowledge could come. For the inner knowledge comes from within and above (whether from the Divine in the heart or from the Self above) and for it to come, the pride of the mind and vital in the surface mental ideas and their insistence on them must go. One must know that one is ignorant before one can begin to know. This shows that I am not wrong in pressing for the psychic opening as the only way out. For as the psychic opens, such responses and much more also become common and the inner change also proceeds by which they are made possible.
Reading and study are only useful to acquire information and widen one's field of data. But that comes to nothing if one does not know how to discern and discriminate, judge, see what is within and behind things.
There are Two who are One and play in many worlds;
In Knowledge and Ignorance they have spoken and met
And light and darkness are their eyes' interchange.
Our pleasures and pain are their wrestle and embrace,
Our deeds, our hopes are intimate to their tale;
They are married secretly in our thought and life.