This book is quite easy and compelling to read because Mamet brooks no disagreement whatsoever and does not pause to consider alternatives to his approach. In that respect it is like a self-help book, and I do not mean that as strictly a criticism: it is useful, if one is trying to genuinely change the way one lives, to read someone say something like "act first to desire your own good opinion of yourself" with total sincerity and seriousness (42).
Mamet's discussion of how to be a good actor seems eminently plausible to me. He wants to strip away all the faux-authenticity that comes from trying to reproduce on-stage the emotions that you imagine the character in the script is experiencing; in fact, he wants to eliminate the concept of a dramatic character altogether. "The actor does not need to "become" the character. The phrase, in fact, has no meaning. There is no character. There are only lines upon a page. They are lines of dialogue meant to be said by the actor" (9). It's radically simple and difficult to refute.
Mamet has an odd moment early on where he strings Stanislavsky's method together with psychoanalysis and complains that neither of them "show demonstrable results" or "tend towards closure" (15). For anyone who knows at least a little about psychoanalysis it should be clear that this is a common and superficial manner of denigrating the practice. Since Mamet doesn't spend much time on it (indeed, he quotes Freud approvingly later in the book: "as Freud said, a man with a toothache can't be in love" (94)) I don't he's very invested in his criticism here. Stanislavsky is the real demon that True and False is trying to exorcise.
However, I think, funnily enough, that there are quite a few psychoanalytic moments in this book's overall theoretical conception. Fundamentally Mamet wants actors to stop intellectualising their characters, and also to stop regularising their emotions, to stop schematising each script with pre-arranged memories and trigger words and sense checkpoints and so forth, so that they can instead direct their emotional energy outwards, towards the other actors on stage, and towards the actual achievement of a goal. This is what makes the play interesting to the audience, because an audience cannot see the authenticity of your emotions: what they can see, and what human beings are usually interested in, is the struggle involved in solving a problem or attaining a genuine goal, and, as in life, most goals (to open a window, to clean up a mess, to succeed in battle, to ask for a date, to ask for a divorce) are not accomplished by turning inwards. This is a fairly standard Freudian motif: firstly, to succeed in psychoanalysis you have to be honest about your emotions; you have to allow yourself the freedom to feel your emotions as they come up in the discussion, or in dreams or free association. Secondly, in order to become more mature, in a psychoanalytic context, you can't dwell entirely in narcissism, which tends towards neurosis: you need to recognise and appreciate the inner lives of Others, and not just see them as obstacles or duplicate Mothers or Fathers.
On page 87 Mamet writes that "Psychoanalysis hasn't been able to cure [anxiety, guilt, nervousness, self-consciousness, ambivalence - in short, the human condition] in a hundred years, and an acting school isn't going to cure them in two easy terms." I feel like he's onto something with the critique of acting schools, but is not this thing that he describes - this human condition, which he encourages actors to embrace on stage, to take their everyday anxiety and guilt and let it charge the words of the script with meaning, to have the courage to let the script speak while affecting it as its faithful transmitter - exactly what Freud describes as 'ordinary unhappiness'? Mamet has a perfectly psychoanalytic take, I think, a Stoical interest in and acceptance of the vicissitudes of psychic existence which can be efficaciously channeled into artistic practice. I think this book is very ambitious given its length but I will be thinking about it for a while.