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.

p. 344 - Alien Dawn (1998)