I think it's strange - so alike and yet so different! We are capable of working together, of building the Pyramids of Egypt, the Great Wall of China, the cathedrals of Europe and the temples of Peru. We can compose unforgettable music, work in hospitals, create new computer programs. "But at some moment all this loses its meaning, and we feel alone, as if we were part of another world, different from the one we have helped to build." "At times, when others need our help, we grow desperate because this prevents us from enjoying life. At other times, when nobody needs us, we feel useless. "But that's the way we are. We are complex human beings. Why despair?