What we can't do is use this tragedy as one more occasion to turn on each other. Barack Obama
When you teach a man to hate and fear his brother, when you teach that he is a lesser man because of his color or his beliefs or the policies he pursues, when you teach that those who differ from you threaten your freedom or your job or your family, then you also learn to confront others not as fellow citizens but as enemies, to be met not with cooperation but with conquest; to be subjugated and mastered. Robert Kennedy
Darkness cannot drive out darkness; only light can do that. Hate cannot drive out hate; only love can do that. Hate multiplies hate, violence multiplies violence, and toughness multiplies toughness in a descending spiral of destruction ... The chain reaction of evil -- hate begetting hate, wars producing more wars -- must be broken, or we shall be plunged into the dark abyss of annihilation. Martin Luther King