Muhammed rebuked his grandson for not calling a servant "uncle." The servant being older must know more than he. Gentleness, sense of respect, and veneration make man different from animals. If men were not animals, the past war would have been impossible. Dogs bark at each other. Not only one prophet, but all prophets have brought the message that man should show himself higher than the animals in this respect and men should give in to one another instead of barking at each other. The first lesson to humanity has been that of idealizing. It is not only the Bible that says, "blessed are the humble, the gentle, the meek," it is also said in the Qur'an and other sacred books. It was even taught in the old Roman civilization. Each nation that has arrived at the point of understanding and acting according to true humanity has come to understand that man is different from animals only to the extent to which he idealizes. This is greater than art, greater than religion, greater than anything, and is the source of great joy. Before we can enjoy life we must become delicate, sensitive, and evolved. When this is attained, a person experiences a kind of joy in bowing his head such as is not found in ordinary people.