The study of science has become so important in the modern world that we sometimes find ourselves wondering whether other studies are not a waste of time. No knowledge of Greek or Latin literature for example will help us to feed million of hungry children in Bengal, or to lighten the sufferings in our great cities of people who are old and poor and sick. No reading of poems and plays and novels (many of them written hundreds of years ago) will save the life of a single soldier on the world's latest battlefield.