“Creation retains its beauty which fills us with awe and it remains a good work. But there is also ‘violence, division, disagreement, war’. This occurs when man, the summit of creation, stops contemplating beauty and goodness, and withdraws into his own selfishness.
“When man thinks only of himself, of his own interests, and places himself in the center, when he permits himself to be captivated by the idols of dominion and power, when he puts himself in God’s place, then all relationships are broken and everything is ruined; then the door opens to violence, indifference, and conflict. . . .
“Can we say this: that from harmony he passes to ‘disharmony’? No, there is no such thing as ‘disharmony’; there is either harmony or we fall into chaos, where there is violence, argument, conflict, fear.
“It is exactly in this chaos that God asks man’s conscience: “Where is Abel your brother?” and Cain responds: ‘I do not know; am I my brother’s keeper?’. We too are asked this question, it would be good for us to ask ourselves as well: Am I really my brother’s keeper? Yes, you are your brother’s keeper! To be human means to care for one another! But when harmony is broken, a metamorphosis occurs: the brother who is to be cared for and loved becomes an adversary to fight, to kill. What violence occurs at that moment, how many conflicts, how many wars have marked our history! We need only look at the suffering of so many brothers and sisters.”
–Pope Francis, vigil for peace, Sept. 7, 2013