We might liken the 'two selves' to Laurel and Hardy. Ollie is the objective mind, 'you'. Stan is the subjective mind, the 'hidden you'. But Stan happens to be in control of your energy supply. So if you wake up feeling low and discouraged, you (Ollie) tend to transmit your depression to Stan, who fails to send you energy, which makes you feel lower than ever. This vicious circle is the real cause of most mental illness.

Once we can see how this question of freedom of the will has been vitiated by post-romantic philosophy, with its inbuilt tendency to laziness and boredom, we can also see how it came about that existentialism found itself in a hole of its own digging, and how the philosophical developments since then have amounted to walking in circles round that hole.

They certainly demonstrate that Seth, whether an aspect of Jane Robert's unconscious mind or a genuine "spirit," was of a high level of intelligence. Yet when Jane Roberts produced a book that purported to be the after-death journal of the philosopher William James, it was difficult to take it seriously. James's works are noted for their vigour and clarity of style; Jane Robert's "communicator" writes like an undergraduate . . . there is a clumsiness here that is quite unlike James's swift-moving, colloquial prose.

Now, obviously, the human race is on the point of an extremely interesting evolutionary development. The first step towards escape from this vicious circle is to recognize that the apparent "ordinariness" of the world is a delusion. If we could become deeply and permanently convinced that the world "out there" is endlessly exciting, we would never again allow ourselves to become trapped in the swamp of "taken-for-grantedness". And we would become practically unkillable. Shaw says of his "Ancients" in Back to Methuselah "Even in the moment of death, their life does not fail them". "Life failure" is that feeling that there is nothing new under the sun, and that we all have to accept defeat in the end. If we could learn the mental trick of causing the dynamo to accelerate, this illusion would never again be able to exert its power over us.

The progress of human knowledge depends on maintaining that touch of scepticism even about the most "unquestionable" truths. A century ago, Darwin's theory of evolution by natural selection was regarded as scientifically unshakeable; today, most biologists have their reservations about it. Fifty years ago, Freud's sexual theory of neurosis was accepted by most psychiatrists; today, it is widely recognized that his methods were highly questionable. At the turn of this century, a scientist who questioned Newton's theory of gravity would have been regarded as insane; twenty years later, it had been supplanted by Einstein's theory, although, significantly, few people actually understood it. It seems perfectly conceivable that our descendants of the twenty-second century will wonder how any of us could have been stupid enough to have been taken in by Darwin, Freud or Einstein.

The "passion for incredulity" can produce as much self-deception as the uncritical will to believe.

Taken as a whole, the Cross Correspondences and the Willet scripts are among the most convincing evidence that at present exists for life after death. For anyone who is prepared to devote weeks to studying them, they prove beyond all reasonable doubt that Myers, Gurney, and Sidgwick went on communicating after death.

What is beginning to emerge, then, is a theory about psychic sensitivity. It runs as follows. When I relax deeply, it is as if someone opened up the partition between the two compartments of my brain, turning them into a single large room. I experience a sense of mental freedom as if I can suddenly breathe more deeply, and a feeling of contact with things. Everyone has had the experience of being in a state of hurry or excitement, and failing to notice that they have bruised or scratched themselves -- until the excitement evaporates and the pain makes itself known. Hurry and tension raise our sensitivity threshold, and at the same time, erect a glass wall between us and reality. In the "unicameral" state, this wall vanishes, and everything seems more real.

These left me in no doubt that something was trying to communicate with us, but that direct communication would be counterproductive. It seemed to be an important part of the scheme to create a sense of mystery.

Why is it so hard to keep the mind concentrated, and to live up to our good resolutions? The problem is the basically mechanical nature of our left-brain consciousness. We have a kind of robot servant who does things for us: we learn to type or drive a car, painfully and consciously, then our robot takes over, and does it far more quickly and efficiently. Because man is the most complex creature on Earth, he is forced to rely on his robot far more than other animals. The result is that, whenever he gets tired, the robot takes over. For the modern city dweller, most of his everyday living is done by the robot. This is why it takes an emergency to concentrate the mind 'wonderfully', and why we forget so quickly.