By happiness I mean here a deep sense of flourishing that arises from an exceptionally healthy mind. This is not a mere pleasurable feeling, a fleeting emotion, or a mood, but an optimal state of being. Happiness is also a way of interpreting the world, since while it may be difficult to change the world, it is always possible to change the way we look at it.

No change occurs if we just let our habitual tendencies and automatic patterns of thought perpetuate and even reinforce themselves, thought after thought, day after day, year after year. But those tendencies and patterns can be challenged.

Happiness is a state of inner fulfillment, not the gratification of inexhaustible desires for outward things.

When faced with adverse circumstances, if you can do something, do it and there is not need to worry. If you can't do anything, then there is no point to worry. So in either case, worrying is an added suffering. But this does not mean of course that we should not be unhappy about injustice, abuse and other kinds of behavior that brings suffering upon others.

we find that the optimists have an undeniable advantage over the pessimists. Many studies show that they do better on exams, in their chosen profession, and in their relationships, live longer and in better health, enjoy a better chance of surviving postoperative shock, and are less prone to depression and suicide.

If we dedicate a certain amount of time each day to cultivating compassion or any other positive quality, we are likely to attain results, just like when we train the body... Meditation consists of familiarizing ourselves with a new way of being, of managing our thoughts and the way we perceive the world. Through the recent advances in neuroscience it is now possible to evaluate these methods and to verify their impact on the brain and body.

We vastly underestimate the power of transformation of mind.