The following is from 'The Pocket Thich Nhat Hanh' (click to learn more).
and published by 'Shambhala Pocket Classics'.
THE PEACEFUL REVOLUTION
"Some people spend their whole life trying only to get revenge.
This kind of desire or volition will bring great suffering not only to others
but to oneself as well.
Hatred is a fire that burns in every soul and can only be tempered by compassion.
But where do we find compassion?
It isn't sold in the supermarket.
If it were, we would only need to bring it home
and we could solve all the hatred and violence in the world very easily.
But compassion can only be produced in our own heart by our own practice."