Dalai Lama said this quote

Our lives are in constant flux, which generates many predicaments. But when these are faced with a calm and clear mind supported by spiritual practice, they can all be successfully resolved. When our minds are clouded by hatred, selfishness, jealousy, and anger, we lose not only control but also our judgment. At those wild moments, anything can happen, including war. Although the practice of compassion and wisdom is useful to us all, it is especially valuable for those responsible for running national affairs, in whose hands lie the power and opportunity to create a framework for world peace.

~ Dalai Lama

Compassion can be roughly defined in terms of a state of mind that is nonviolent, non-harming, and nonaggressive. It is a mental attitude based on the wish for others to be free of their suffering and is associated with a sense of commitment, responsibility, and respect towards others.

~ Dalai Lama

Too much self-centered attitude, you see, brings, you see, isolation. Result: loneliness, fear, anger. The extreme self-centered attitude is the source of suffering.

~ Dalai Lama

It is very important to generate a good attitude, a good heart, as much as possible. From this, happiness in both the short term and the long term for both yourself and others will come.

~ Dalai Lama