From "Don't sweat the small stuff...and it's all small stuff" by Richard Carlson ISBN 0786881852

"When you're in an ill mood, learn to pass it off as simply that: an unavoidable human condition that will pass with time, if you leave it alone. A low mood is not the time to analyze your life. To do so is emotional suicide. If you have a legitimate problem, it will still be there when your state of mind improves. The trick is to be grateful for our good moods and graceful in our low moods - not taking them too seriously. The next time you feel low, for whatever reason, remind yourself 'This too shall pass'. It will."

Excerpt from "The Dalai Lama's Little Book of Wisdom" ISBN 0007173172

"The way our attitude works is such that it is often troubled by outside factors, so one side of the issue is to eliminate the existence of trouble around you. The environment, meaning the surrounding situation, is a very important factor for establishing a happy frame of mind. However, even more important is the other side of the issue, which is one's own mental attitude.

The surrounding situation may not be so friendly, it may even be hostile, but if your inner mental attitude is right, then the situation will not disturb your inner peace. On the other hand, if your attitude is not right, then even if you are surrounded by good friends and the best facilities, you cannot be happy. This is why mental attitude is more important than external conditions. Despite this, it seems to me that many people are more concerned about their external conditions, and neglect the inner attitude of mind. I suggest that we should pay more attention to our inner qualities.

There are a number of qualities which are important for mental peace, but from the little experience I have, I believe that one of the most important factors is human compassion and affection: a sense of caring"