It is said in the Quran that Allah has made man the Khalif, the chief of creation, because of this one gift: speech. Man alone has the gift of eloquence. But while some men are like a rock, and some like a plant or an animal, others possess the human quality. The man who is like a rock has no expression; he has no magnetism. He has only what is in his appearance, just like the stones, even the emerald or the ruby; when that is gone, nothing is left. The man who is like a plant has no intelligence, only some feelings, some personality. There may be some beauty in him, or he may be like a thorn, or poisonous. The man who is like an animal has feelings and passions, but he cannot give expression to them. That man only is a human being who has the gift of expression, and who can speak out about what he feels.