selecting and focusing on positive mental states and challenging negative mental statesâis possible because of the very structure and function of the brain. We are born with brains that are genetically hardwired with certain instinctual behavior patterns; we are predisposed mentally, emotionally, and physically to respond to our environment in ways that enable us to survive. These basic sets of instructions are encoded in countless innate nerve cell activation patterns, specific combinations of brain cells that fire in response to any given event, experience, or thought. But the wiring in our brains is not static, not irrevocably fixed. Our brains are also adaptable. Neuroscientists have documented the fact that the brain can design new patterns, new combinations of nerve cells and neurotransmitters (chemicals that transmit messages between nerve cells) in response to new input. In fact, our brains are malleable, ever changing, reconfiguring their wiring according to new thoughts and experiences. And as a result of learning, the function of individual neurons themselves change, allowing electrical signals to travel along them more readily. Scientists call the brainâs inherent capacity to change âplasticity.â
This ability to change the brainâs wiring, to grow new neural connections, has been demonstrated in experiments such as one conducted by Doctors Avi Karni and Leslie Underleider at the National Institutes of Mental Health. In that experiment, the researchers had subjects perform a simple motor task, a finger-tapping exercise, and identified the parts of the brain involved in the task by taking a MRI brain scan. The subjects then practiced the finger exercise daily for four weeks, gradually becoming more efficient and quicker at it. At the end of the four-week period, the brain scan was repeated and showed that the area of the brain involved in the task had expanded ; this indicated that the regular practice and repetition of the task had recruited new nerve cells and changed the neural connections that had originally been involved in the task.
This remarkable feature of the brain appears to be the physiological basis for the possibility of transforming our minds. By mobilizing our thoughts and practicing new ways of thinking, we can reshape our nerve cells and change the way our brains work. It is also the basis for the idea that inner transformation begins with learning (new input) and involves the discipline of gradually replacing our ânegative conditioningâ (corresponding with our present characteristic nerve cell activation patterns) with âpositive conditioningâ (forming new neural circuits). Thus, the idea of training the mind for happiness becomes a very real possibility.
ETHICAL DISCIPLINE
In a later discussion related to training the mind for happiness, the Dalai Lama pointed out, âI think that ethical behavior is another feature of the kind of inner discipline that leads to a happier existence. One could call this ethical discipline. Great spiritual teachers like the Buddha advise us to perform wholesome actions and avoid indulging in unwholesome actions. Whether our action is wholesome or unwholesome depends on whether that action or deed arises from a disciplined or undisciplined state of mind. It is felt that a disciplined mind leads to happiness and an undisciplined mind leads to suffering, and in fact it is said that bringing about discipline within oneâs mind is the essence of the Buddhaâs teaching.
âWhen I speak of discipline, Iâm referring to self-discipline, not discipline thatâs externally imposed on you by someone else. Also, Iâm referring to discipline thatâs applied in order to overcome your negative qualities. A criminal gang may need discipline to perform a successful robbery, but that discipline is useless.â
The Dalai Lama stopped speaking for a moment and seemed to be reflecting, gathering his thoughts.