An Engineer creates that which never was. It has never promised us peace or happiness. The cell is a machine. The animal is a machine.
Man is a machine.
If we do discover a complete theory, it should in time be understandable in broad principle by everyone, not just a few scientists. Then we shall all, philosophers, scientists, and just ordinary people, be able to take part in the discussion of why it is that we and the universe exist. Insensibly, one begins to twist facts to suit theories, instead of theories to suit facts. In all chaos there is a cosmos, in all disorder a secret order. The most beautiful experience we can have is the mysterious.