Peace, in the sense of the absence of war, is of little value to someone who is dying of hunger or cold. It will not remove the pain of torture inflicted on a prisoner of conscience. It does not comfort those who have lost their loved ones in floods caused by senseless deforestation in a neighboring country. Peace can only last where human rights are respected, where the people are fed, and where individuals and nations are free. True peace with oneself and with the world around us can only be achieved through the development of mental peace. The other phenomena mentioned above are similarly interrelated. Thus, for example, we see that a clean environment, wealth or democracy mean little in the face of war, especially nuclear war, and that material development is not sufficient to ensure human happiness.
Material progress is of course important for human advancement. In Tibet, we paid much to little attention to technological and economic development, and today we realize that this was a mistake. At the same time, material development without spiritual development can also cause serious problems. In some countries too much attention is paid to external things and very little importance is given to inner development. I believe both are important and must be developed side by side so as to achieve a good balance between them. Foreign visitors as being a happy, jovial people always describe Tibetans. This is part of our national character, formed by cultural and religious values that stress the importance of mental peace through the generation of love and kindness to all other living sentient beings, both human and animal. Inner peace is the key: if you have inner peace, the external problems do not affect your deep sense of peace and tranquility. In that state of mind you can deal with situations with calmness and reason, while keeping your inner happiness. This is very important. Without this inner peace, no matter how comfortable your life is materially, you may still be worried, disturbed or unhappy because of circumstances.
Tenzin Gyatso, 14th Dalai Lama