
It is generally believed that it is the students who derive benefit by working under the guidance of a professor. In reality, the professor benefits equally by his association with gifted students working under him.
To an observer situated on the moon or on one of the planets, the most noticeable feature on the surface of our globe would no doubt be the large areas covered by oceanic water. The sunlit face of the earth would appear to shine by the light diffused back into space from the land and water-covered areas.