“In our ordinary life, even thought we work very hard to find happiness it remains elusive for us, while sufferings and problems seem to come naturally, without any effort. Why is this? It is because the cause of happiness within our mind-inner peace-is very weak and can give rise to its effect only if we apply great effort, while the internal causes of suffering and problems-delusions-are very strong and can give rise to their effects with no effort on our part. This is the real reason why problems come naturally while happiness is so difficult to find.
From this we can see that the principal causes of both happiness and problems are in the mind, not in the external world. If we were able to maintain a calm and peaceful mind all day long we would never experience any problems or mental suffering. For example, if our mind remains peaceful all the time, then even if we are insulted, criticized, or blamed, or if we lose our job or our friends, we will not become unhappy. No matter how difficult our external circumstances may become, as long as we maintain a calm and peaceful mind they will not be a problem for us. Therefore, if we wish to be free from problems there is only one thing to do-learn to maintain a peaceful state of mind by following the spiritual path.
The essential point of understanding the mind is that liberation from suffering cannot be found outside the mind. Permanent liberation can be found only by purifying the mind. Therefore, if we want to become free from problems and attain lasting peace and happiness we need to increase our knowledge and understanding of the mind.”
Taken from Transform Your Life by Geshe Kelsang Gyatso