Call him brother, he answers brother, and he means it. With regard to principles, the Sufi has none, for sweetness may be beneficial to one and harmful to another. Thus it is with all principles, good and bad, kind and cruel. If we ask a soldier to be merciful during the battle, he will at once be defeated. This shows that everyone has his own principle for each action or situation. One person may believe in a certain principle, while another may hold quite a contrary opinion. What one person may call good another may call bad. One says a certain path is the right one, while another takes the opposite direction.