What creates differences between people ?

Everything creates differences between us. The color of our skin, the color of our eyes, our hair, our way of walking, our height, our weight, everything! And people use this difference to offend others and even beat others. People fight against each other because one is different from the other. By the other hand, there is love because our difference, sometimes. People love each other because they are so different, but, in at the same time, so equal!