One of the aims of Blake’s work is to encourage integration of the various disconnected aspects of the human brain and body. Under Urizenic (left brain dominant) systems, these often become split off and psychotic – a form of dissociative identity disorder, presented in the Bible, Dante, and Milton as separate-headed ‘demons’ – the compulsive and obsessive nature of processes that are not properly integrated. The cause of this is usually a form of hyper-rationalisation, which McGilchrist and Louis Sass associate both with schizo-phrenia and modern forms of madness.