“Peace is not only better than war, but infinitely more arduous.”

“Ask not what your country can do for you—ask what you can do for your country.”

“Those who make peaceful revolution impossible will make violent revolution inevitable.”

“The proletarians have nothing to lose but their chains. They have a world to win.”

“War may sometimes be a necessary evil. But no matter how necessary, it is always an evil, never a good. We will not learn how to live together in peace by killing each other's children.”