Each person is at each moment capable of remembering all that has ever happened to him and of perceiving everything that is happening everywhere in the universe. The function of the brain and nervous system is to protect us from being overwhelmed and confused by this mass of largely useless and irrelevant knowledge, by shutting out most of what we should otherwise perceive or remember at any moment, and leaving only that very small and special selection which is likely to be practically useful.

The function of the brain and the nervous system is to protect us from being overwhelmed and confused by this mass of largely useless and otherwise irrelevant knowledge, by shutting out most of what we should otherwise perceive.

The trouble is, the human brain isn’t designed to make us happy and fulfilled. It’s designed to make us survive. This two-million-year-old organ is always looking for what’s wrong, for whatever can hurt us, so that we can either fight it or take flight from it. If you and I leave this ancient survival software to run the show, what chance do we have of enjoying life?

The brain has conflicting goals: to provide you with information, and to reduce your anxiety about the worrying outcome. If you wanted Clinton to win in 2016, your brain achieved both goals by accepting the 30% figure but telling you it would not happen.

The machine is only a tool after all, which can help humanity progress faster by taking some of the burdens of calculations and interpretations off its back. The task of the human brain remains what it has always been; that of discovering new data to be analyzed, and of devising new concepts to be tested.

That’s what the human brain is there for — to turn the chaos of given experience into a set of manageable symbols. Sometimes the symbols correspond fairly closely to some of the aspects of the external reality behind our experience; then you have science and common sense. Sometimes, on the contrary, the symbols have almost no connection with external reality; then you have paranoia and delirium. More often there’s a mixture, part realistic and part fantastic; that’s religion.

Fortunately for mankind the brain in a life of action turns more to the matter in hand than to conjuring up the chances of the future.

That's what the human brain is there for — to turn the chaos of given experience into a set of manageable symbols. Sometimes the symbols correspond fairly closely to some of the aspects of the external reality behind our experience; then you have science and common sense. Sometimes, on the contrary, the symbols have almost no connection with external reality; then you have paranoia and delirium. More often there's a mixture, part realistic and part fantastic; that's religion.

If we want to keep the old language, still using such terms as “spiritual” and “material,” the spiritual must mean “the indefinable,” that which, because it is living, must ever escape the framework of any fixed form. Matter is spirit named. After all this, the brain deserves a word for itself! For the brain, including its reasoning and calculating centers, is a part and product of the body. It is as natural as the heart and stomach, and, rightly used, is anything but an enemy of man. But to be used rightly it must be put in its place, for the brain is made for man, not man for his brain. In other words, the function of the brain is to serve the present and the real, not to send man chasing wildly after the phantom of the future.

Your brain is not designed to make you happy. Your brain has only one agenda in mind: survival.

"This is why modern civilization is in almost every respect a vicious circle. It is insatiably hungry because its way of life condemns it to perpetual frustration. [...] [T]he root of this frustration is that we live for the future, and the future is an abstraction, a rational inference from experience, which exists only for the brain. The "primary consciousness," the basic mind which knows reality rather than ideas about it, does not know the future. It lives completely in the present, and perceives nothing more that what is at this moment. The ingenious brain, however, looks at that part of present experience called memory, and by studying it is able to make predictions. These predictions are, relatively, so accurate and reliable (e.g., "everyone will die") that the future assumes a high degree of reality - so high that the present loses its value."

There is no doubt that the human mind is fundamentally incapable of solving these formidable problems (the origin of life, nature of matter, origin of movement, and appearance of consciousness). Our brain is an organ of action that is directed toward practical tasks; it does not appear to have been built for discovering the ultimate causes of things, but rather for determining their immediate causes and invariant relationships.

Cambridge philosopher, Dr. C. D. Broad, "that we should do well to consider much more seriously than we have hitherto been inclined to do the type of theory which Bergson put forward in connection with memory and sense perception. The suggestion is that the function of the brain and nervous system and sense organs is in the main eliminative and not productive. Each person is at each moment capable of remembering all that has ever happened to him and of perceiving everything that is happening everywhere in the universe. The function of the brain and nervous system is to protect us from being overwhelmed and confused by this mass of largely useless and irrelevant knowledge, by shutting out most of what we should otherwise perceive or remember at any moment, and leaving only that very small and special selection which is likely to be practically useful." According to such a theory, each one of us is potentially Mind at Large. But in so far as we are animals, our business is at all costs to survive. To make biological survival possible, Mind at Large has to be funneled through the reducing valve of the brain and nervous system. What comes out at the other end is a measly trickle of the kind of consciousness which will help us to stay alive on the surface of this particular planet. To formulate and express the contents of this reduced awareness, man has invented and endlessly elaborated those symbol-systems and implicit philosophies which we call languages.

The Machine is only a tool after all, which can help humanity progress faster by taking some of the burdens of calculations and interpretations off its back. The task of the human brain remains what it has always been; that of discovering new data to be analyzed, and of devising new concepts to be tested.