A teacher once asked his students: how can you tell that the night is over and the day has begun? A student replied: is it when from a distance I could see a tree and I can tell whether that tree is an apple or an orange tree? The teacher said, not yet. Another student volunteered: is it when from a distance I could see an animal and I could tell whether it is a cow or a horse? The teacher said, not quite. The students chorused, then tell us how. The teacher said, it is when from a distance you could see a person and you can already see in that person the face of a brother or a sister. When that happens, surely, the darkness of night has ended and the brightness of day has begun.