The ideal student would be one who was not working for grades but was working because he was interested in the work and not trying to compete with fellow students.
Interview with Carl Anderson (1979). Oral History Project, California Institute of Technology Archives, Pasadena, California.
The atom can't be seen, yet its existence can be proved. And it is simple to prove that it can't ever be seen. It has to be studied by indirect evidence — and the technical difficulty has been compared to asking a man who has never seen a piano to describe a piano from the sound it would make falling downstairs in the dark.Carl David Anderson