War begins when we harden our hearts, and we harden them easily — in minor ways and then in quite serious, major ways, such as hatred and prejudice — whenever we feel uncomfortable. It's so sad, really, because our motivation in hardening our hearts is to find some kind of ease, some kind of freedom from the distress that we're feeling.

Someone once gave me a poem with a line in it that offers a good definition of peace: "Softening what is rigid in our hearts." We can talk about ending war and we can march for ending war, we can do everything in our power, but war is never going to end as long as our hearts are hardened against each other.

Pema Chodron, Practicing Peace in Times of War