If you take stock of the day as you go to bed and lie down—don’t you do this?—saying “I should have done this, I should not have done that”, “It would have been better that way, I wish I hadn’t said this”—when you take stock of the things that have happened during the day, then you are trying to bring about order before you go to sleep. And if you don’t make order before you go to sleep, the brain tries to do it when you are asleep. Because the brain functions perfectly only in order, not in disorder. If functions most efficiently when there is complete order, whether that order is neurotic or rational; because in neurosis, in imbalance, there is order, and the brain accepts that order.
So, if you take stock of everything that has been happening during the day before you go to sleep, then you are trying to bring about order, and therefore the brain does not have to bring order while you are asleep: you have done it during the day. You can bring about that order every minute during the day, that is if you are aware of everything that’s happening, outwardly and inwardly.
The Awakening of Intelligence, pp 62-63