I purchased this book in its first edition when I was in my late twenties trying to climb the corporate ladder. I had just finished reading James Clavell's 'Shogun', was deep into the Akira manga and began dating a girl from Shinjuku. Needless to say I was a bit overboard on the whole Asian trip. But you remember the 80s, we were all thinking about the Pacific Rim. With that in mind, I took this book more seriously than the average reader might, but let me tell you something, it was profoundly impressive, and it worked.
The book is laid out in such a way that it makes a perfect blueprint for a year's worth of meditations. I rushed the process, but memorized each of the pages, and followed up with journal writings. A bit more extreme than the average bear, I confess but it made such a difference. Now, more than ten years later, what I have internalized from that period remains core. As I review the axioms, it's hard for me to imagine how I saw things before they became as self-evident to me as they are now. And yet I still find myself drawn to repeat the entire process as I embrace a new set of challenges at middle age.
I'm not the kind given to 12 step programs and all that, I make jokes about the person who asks for directions to the self-help section of the bookstore, but this is great stuff for the most hard headed pragmatists as well as the wooliest thumbsuckers. My recommendation to you is to take this book as a guide to meditations and study of the tao. The deeper you are into 'untenable' situations, the more profound the insights you will gain.