I didn't read this edition exactly, but one from the 1960s.
This book produced one of the more troubling moments while I was on retreat at Thomas Merton's former monastery, Gethsemani. Father Damion, the Guestmaster there, had described many of the concepts in this book without referencing this book directly, only saying "Merton said." In particular, the idea that our ultimate goal, as Christians, is to someday achieve the state where it is not my will, but God's will, that is done in every action and thought. This is a divinely-inspired state and can only arise out of humility, yet another state that cannot be achieved by anything other than grace. (Because, of course, the minute you think you are being humble, you have already lost humility.) Needless to say, it is easy to see the cycle of self-loathing at one's won inability to do anything in this model, peace that one must simply wait for God, and then more loathing that can occur. I was set adrift in this cycle when I picked up this book.
When I started reading it, it certainly did not help. It produced the one time I really totally broke down, completely sobbing. Because the entire first portion of this book is describing all the states of thought and being which are not complete union with God's will. And I was exhibiting pretty much all of them. Merton doesn't spare words; his prose is concise and intentional. Therefore, at the time, it seemed so very harsh and it all seemed worthless. I finally put the book down halfway through because I simply could not take it any longer and needed to do the Office anyway.
When I came back, the entire second half of the book is so reassuring and practical. It's not particularly a method, but the description by which you would start to go about trying to touch God, and assurances of this process. I found that I could also identify with much of what he described, and many more palliative phrases come into play. For instance, he reminds the reader that the only needful thing is that one really seriously crave God; that is really all he asks from us. I don't know if Merton was purposefully attempting a trial by fire or if I was very informed by what was going on in my own soul at the time, but this book was very, very hard and also incredibly insightful. I simply urge anyone having my same experience, that the book is so hard in the beginning, to stick it through. Merton doesn't simply leave you out there like in the desert he describes, but he does begin to bring you in. I intend to buy a copy, likely the newer version, and read it again soon.