This book, despite its slimness, is a great big hunk of deepness.
The author brilliantly synthesizes existentialist phenomenology (drawing mainly from Heidegger in its emphasis on the fundamentally interpretative nature of human life, as well as Merleau-Ponty with regards to the inescapable ontology of our embodiment) with Hegel (in its central thesis of conflict being crucial for development) as well as Freud, the book being an examination of human neurosis after all.
The author, showing a clear phenomenological approach, bypasses the 'positivistic' conceptualization of personhood and thus of the psyche and the neurotic problems that affect it. Instead, the author argues, neurosis is fundamental to the human condition itself, an early construction of identity based on our initial introduction to intersubjectivity, which guarantees our entry into the social world, which is in fact, our world simpliciter. Neurosis, the conflict between two interpretations of reality, is simply how we function as embodied, interpretative beings.
This does not mean that neurosis is not a problem, however ; when we claim to want something, but we are in fact compelled to do the opposite, we are puzzled and frustrated. The true problem, however, is that we are simply unaware of our habitual way of being in the world compels us towards a series of actions that are at odds with what we actually wish to do with our lives.
Here, the author brilliantly re-conceptualizes the Aristotelian dictum, 'Know thyself' as a modern panacea for neurotic imbalance. Philosophy is in fact a self-conscious educative process, by which our unconscious habituation to interpersonal reality is brought into explicit view, for our conscious deliberation.
Of course, this is simply the main thesis, and my own main take-away ; but there is a wealth of insight in this slim tome, and I would recommend it without reservation for those wondering why they keep making the same mistakes over and over again, for those who feel 'stuck' in some way, and finally, for those who are simply interested in phenomenology, philosophy, psychology, and general human flourishing.