Dr Letwin considers that passion and intellect - feelings and judgement - are quite naturally twinned in healthy human behaviour. He objects to the 'romantic' notion of our having higher and lower selves in competition with each other, advocating instead a view of man as a being naturally capable of holding thinking and feeling in balance - which he calls the classical view. As far as he goes his case is well argued and quite compelling. However, not touched on is the subconscious: no mention is made of Nietzsche or Freud, who describe controlling compulsions that we may never be conscious of. Nevertheless, I recommend this small book for its method, clarity and elegance.