Salvation and justice are not to be found in revolution, but in evolution through concord. Violence has ever achieved only destruction, not construction; the kindling of passions, not their pacification; the accumulation of hate and destruction, not the reconciliation of the contending parties; and it has reduced men and parties to the difficult task of building slowly after sad experience on the ruins of discord.

Peace on earth: a commentary on Pope John's encyclical (ed. 1964)