It is clear that there is a very great deal to be learnt about the universe and the endless subtleties of its various manifestations. What about the moral side of man, or what people with a religious bent of mind would prefer to call the spiritual nature of man? How will this develop in the endless aeons of the future? Perhaps in most of these questions like Newton we are still standing on the shore while the great ocean of knowledge lies ahead. It is significant that after more than two centuries of the acquisition of knowledge eminent men of science still have similar feelings.