Upheaval after upheaval has reminded us that modern man is traveling along a road called hate, in a journey that will bring us to destruction and damnation. Far from being the pious injunction of a Utopian dreamer, the command to love one's enemy is an absolute necessity for our survival. Love even for enemies is the key to the solution of the problems of our world. Jesus is not an impractical idealist: he is the practical realist.
- Dr. Martin Luther King Jr., "Loving Your Enemies" sermon, collected in Strength to Love.