A story from the Hasidic tradition: "How can we determine the hour of dawn, when the night ends and day begins?" a young man asked.
"Is it when from a distance you can distinguish a dog from a sheep)" suggested another man.
"No," said the old rabbi.
"Is it when you can distinguIsh between a tig tree and a grapevine?" asked yet another student.
"No," said the old teacher. "It is when you can look into the face of another human being, no matter who they are, what they are, and what they've done or not done, and you have enough light to recognize in him or her a brother or sister. Until then, it is night, and darkness us still with you."